diff --git a/src/core/Constract.ts b/src/core/Constract.ts
index 800e6b0..7c499f1 100644
--- a/src/core/Constract.ts
+++ b/src/core/Constract.ts
@@ -32,11 +32,5 @@ const Constract = Object.freeze({
   HEIGHT_WAY: 0.01,
   HEIGHT_WAY_LABEL: 0.03,
   HEIGHT_WAY_LINE: 0.02,
-
-  MAX_WAY_INSTANCES: 10000,
-  MAX_WAY_LINE_INSTANCES: 40000,
-  MAX_MEASURE_INSTANCES: 1000,
-  MAX_GSTORE_INSTANCES: 10000,
-  MAX_PALLET_INSTANCES: 10000
 })
 export default Constract
diff --git a/src/core/ModelUtils.ts b/src/core/ModelUtils.ts
index 9d083a5..ce43604 100644
--- a/src/core/ModelUtils.ts
+++ b/src/core/ModelUtils.ts
@@ -147,7 +147,7 @@ export function getClosestObject(viewport: Viewport, object: THREE.Object3D, ins
     if (object.userData && object.userData.t && object.userData.entityId) {
       // 找到第一个有效的业务 Object3D
       if (object instanceof THREE.InstancedMesh && instanceId >= 0) {
-        return viewport.pointManagerMap.get(object.userData.t)?.findByMeshInstanceId(instanceId)
+        return viewport.pointManagerMap.get(object.userData.t)?.findByMeshInstanceId(object.userData.blockIndex, instanceId)
       }
       return object
     }
diff --git a/src/core/manager/InstanceMeshBlock.ts b/src/core/manager/InstanceMeshBlock.ts
new file mode 100644
index 0000000..e3e9f42
--- /dev/null
+++ b/src/core/manager/InstanceMeshBlock.ts
@@ -0,0 +1,70 @@
+import * as THREE from 'three'
+import type Viewport from '@/core/engine/Viewport.ts'
+
+export default class InstanceMeshBlock {
+  public readonly name: string
+  public readonly blockIndex: number
+  public readonly viewport: Viewport
+  public readonly instancedMesh: THREE.InstancedMesh
+  public readonly freeIndices: number[] = []
+
+  // instanceId -> itemId
+  public readonly __indexIdMap = new Map<number, string>()
+
+  getFreeMeshIndex(): number {
+    if (this.freeIndices.length === 0) {
+      return -1 // No free index available
+    }
+    return this.freeIndices.pop() // Return the last free index
+  }
+
+  constructor(name: string, allowSelect: boolean, allowDrag: boolean, viewport: Viewport,
+              geometry: THREE.BufferGeometry, material: THREE.Material,
+              blockIndex: number, capacity: number) {
+    this.name = name
+    this.blockIndex = blockIndex
+    this.viewport = viewport
+    this.instancedMesh = new THREE.InstancedMesh(geometry, material, capacity)
+    this.instancedMesh.instanceMatrix.setUsage(THREE.DynamicDrawUsage)
+
+    console.log('createBlock: [' + blockIndex + '] created with capacity:', capacity)
+    viewport.scene.add(this.instancedMesh)
+    if (allowSelect) {
+      this.viewport.entityManager._selectableObjects.push(this.instancedMesh)
+    }
+    if (allowDrag) {
+      this.viewport.entityManager._draggableObjects.push(this.instancedMesh)
+    }
+
+    this.instancedMesh.userData.t = name
+    this.instancedMesh.userData.entityId = 'InstanceMeshBlock_' + name + '_' + blockIndex
+
+    const dummy = new THREE.Object3D()
+    dummy.scale.set(0, 0, 0)
+    dummy.updateMatrix()
+
+    for (let i = 0; i < capacity; i++) {
+      this.instancedMesh.setMatrixAt(i, dummy.matrix)
+      this.freeIndices.push(i)
+    }
+
+    this.instancedMesh.instanceMatrix.needsUpdate = true
+  }
+
+  dispose() {
+    this.viewport.scene.remove(this.instancedMesh)
+    this.instancedMesh.geometry.dispose()
+
+    if (this.instancedMesh.material) {
+      if (Array.isArray(this.instancedMesh.material)) {
+        this.instancedMesh.material.forEach(mat => mat.dispose())
+      } else {
+        this.instancedMesh.material.dispose()
+      }
+    }
+
+    this.instancedMesh.dispose()
+    this.__indexIdMap.clear()
+    this.freeIndices.length = 0
+  }
+}
diff --git a/src/core/manager/InstancePointManager.ts b/src/core/manager/InstancePointManager.ts
index 720719b..52f7f9d 100644
--- a/src/core/manager/InstancePointManager.ts
+++ b/src/core/manager/InstancePointManager.ts
@@ -1,23 +1,25 @@
 import * as THREE from 'three'
 import type Viewport from '@/core/engine/Viewport.ts'
 import { Vector3 } from 'three/src/math/Vector3'
+import InstanceMeshBlock from '@/core/manager/InstanceMeshBlock.ts'
 
 /**
  * 点实例管理器
+ * 内部使用 InstanceMesh 用于管理大量点实例
  */
 export default class InstancePointManager {
+  public readonly name: string
   public readonly viewport: Viewport
-  public readonly instancedMesh: THREE.InstancedMesh
+  public readonly allowSelect: boolean
+  public readonly allowDrag: boolean
+  public readonly blockCapacity: number = 1000 // 每个 block 的容量
 
-  private readonly freeIndices: number[] = []
-  private readonly maxInstanceCount: number
+  public readonly blocks: InstanceMeshBlock[] = []
   private readonly geometry: THREE.BufferGeometry
   private readonly material: THREE.Material
   private readonly dummy: THREE.Object3D = new THREE.Object3D()
-  // itemId -> instanceId
+  // itemId -> data
   private __uuidMap = new Map<string, PointManageWrap>()
-  // instanceId -> itemId
-  private __indexIdMap = new Map<number, string>()
 
   createPointSimple(id: string): PointManageWrap {
     //@ts-ignore
@@ -38,21 +40,39 @@ export default class InstancePointManager {
    * @returns 分配的实例ID (如果失败返回-1)
    */
   createPoint(item: ItemJson): PointManageWrap {
-    if (this.freeIndices.length === 0) {
-      system.showErrorDialog('InstancePointManager is full')
+    // Try existing blocks
+    let meshIndex = -1
+    let blockIndex = -1
+    for (const block of this.blocks) {
+      meshIndex = block.getFreeMeshIndex()
+      if (meshIndex >= 0) {
+        blockIndex = block.blockIndex
+        break
+      }
+    }
+    // 所有 block 都没有空闲索引，创建新的 block
+    if (meshIndex < 0) {
+      const block = this.createBlock()
+      meshIndex = block.getFreeMeshIndex()
+      blockIndex = block.blockIndex
+    }
+    if (meshIndex < 0) {
+      system.showErrorDialog('InstancePointManager: No free index available after creating new block')
       return null
     }
 
-    const meshIndex = this.freeIndices.pop()!
-    return new PointManageWrap(this, {
+    return new PointManageWrap(this, blockIndex, meshIndex, {
       uuid: item.id,
       name: item.name,
+      blockIndex: blockIndex,
       meshIndex: meshIndex,
       visible: item.v !== false,
       //@ts-ignore
       userData: {
         t: item.t,
         createType: 'point',
+        blockIndex: blockIndex,
+        meshIndex: meshIndex,
         entityId: item.id
       }
     })
@@ -103,8 +123,12 @@ export default class InstancePointManager {
   /**
    * 获取点实例数据
    */
-  findByMeshInstanceId(instanceId: number): PointManageWrap {
-    const uuid = this.__indexIdMap.get(instanceId)
+  findByMeshInstanceId(blockIndex: number, instanceId: number): PointManageWrap {
+    if (!this.blocks[blockIndex]) {
+      console.error('InstancePointManager: Invalid blockIndex', blockIndex)
+      return null
+    }
+    const uuid = this.blocks[blockIndex].__indexIdMap.get(instanceId)
     if (!uuid) return
     return this.__uuidMap.get(uuid)
   }
@@ -123,13 +147,14 @@ export default class InstancePointManager {
     }
     this.dummy.updateMatrix()
 
+    const block = this.blocks[wrap.blockIndex]
     if (!wrap.parent) {
-      wrap.parent = this.instancedMesh
+      wrap.parent = block.instancedMesh
       this.__uuidMap.set(wrap.uuid, wrap)
-      this.__indexIdMap.set(wrap.meshIndex, wrap.uuid)
+      block.__indexIdMap.set(wrap.meshIndex, wrap.uuid)
     }
-    this.instancedMesh.setMatrixAt(wrap.meshIndex, this.dummy.matrix)
-    this.instancedMesh.instanceMatrix.needsUpdate = true
+    block.instancedMesh.setMatrixAt(wrap.meshIndex, this.dummy.matrix)
+    block.instancedMesh.instanceMatrix.needsUpdate = true
   }
 
   /**
@@ -140,16 +165,18 @@ export default class InstancePointManager {
     const wrap = this.__uuidMap.get(id)
     if (wrap === undefined) return
 
+    const block = this.blocks[wrap.blockIndex]
+
     // 隐藏实例
     this.dummy.scale.set(0, 0, 0)
     this.dummy.updateMatrix()
-    this.instancedMesh.setMatrixAt(wrap.meshIndex, this.dummy.matrix)
-    this.instancedMesh.instanceMatrix.needsUpdate = true
+    block.instancedMesh.setMatrixAt(wrap.meshIndex, this.dummy.matrix)
+    block.instancedMesh.instanceMatrix.needsUpdate = true
 
     // 回收索引
-    this.freeIndices.push(wrap.meshIndex)
+    block.freeIndices.push(wrap.meshIndex)
     this.__uuidMap.delete(id)
-    this.__indexIdMap.delete(wrap.meshIndex)
+    block.__indexIdMap.delete(wrap.meshIndex)
 
     wrap.dispose()
   }
@@ -159,59 +186,70 @@ export default class InstancePointManager {
     viewport: Viewport,
     geometry: THREE.BufferGeometry,
     material: THREE.Material,
-    maxInstances: number = 20000
+    allowSelect: boolean, allowDrag: boolean
   ): InstancePointManager {
-    return new InstancePointManager(name, viewport, geometry, material, maxInstances)
+    return new InstancePointManager(name, allowSelect, allowDrag, viewport, geometry, material)
   }
 
-  private constructor(name: string, viewport: Viewport, geometry: THREE.BufferGeometry, material: THREE.Material, maxInstances: number) {
+  private createBlock(): InstanceMeshBlock {
+    const block = new InstanceMeshBlock(
+      this.name, this.allowSelect, this.allowDrag, this.viewport,
+      this.geometry,
+      this.material, this.blocks.length, this.blockCapacity
+    )
+    this.blocks.push(block)
+    return block
+  }
+
+  private constructor(name: string, allowSelect: boolean, allowDrag: boolean, viewport: Viewport, geometry: THREE.BufferGeometry, material: THREE.Material) {
+    this.name = name
+    this.allowSelect = allowSelect
+    this.allowDrag = allowDrag
     this.viewport = viewport
     this.geometry = geometry
     this.material = material
-    this.maxInstanceCount = maxInstances
-
-    this.instancedMesh = new THREE.InstancedMesh(geometry, material, maxInstances)
-    this.instancedMesh.instanceMatrix.setUsage(THREE.DynamicDrawUsage)
-    this.instancedMesh.name = name
-    console.log('InstancePointManager: [' + name + '] created with maxInstances:', maxInstances)
-    viewport.scene.add(this.instancedMesh)
-    this.viewport.entityManager._selectableObjects.push(this.instancedMesh)
-    this.viewport.entityManager._draggableObjects.push(this.instancedMesh)
-    this.instancedMesh.userData.t = name
-    this.instancedMesh.userData.entityId = 'InstancePointManager'
-
-    this.dummy.scale.set(0, 0, 0)
-    for (let i = 0; i < maxInstances; i++) {
-      this.dummy.updateMatrix()
-      this.instancedMesh.setMatrixAt(i, this.dummy.matrix)
-      this.freeIndices.push(i)
-    }
 
-    this.instancedMesh.instanceMatrix.needsUpdate = true
+    // 创建第一个 block
+    this.createBlock()
+
+
+    // this.instancedMesh = new THREE.InstancedMesh(geometry, material, maxInstances)
+    // this.instancedMesh.instanceMatrix.setUsage(THREE.DynamicDrawUsage)
+    // this.instancedMesh.name = name
+    // console.log('InstancePointManager: [' + name + '] created with maxInstances:', maxInstances)
+    // viewport.scene.add(this.instancedMesh)
+    // if (allowSelect) {
+    //   this.viewport.entityManager._selectableObjects.push(this.instancedMesh)
+    // }
+    // if (allowDrag) {
+    //   this.viewport.entityManager._draggableObjects.push(this.instancedMesh)
+    // }
+    // this.instancedMesh.userData.t = name
+    // this.instancedMesh.userData.entityId = 'InstancePointManager'
+    //
+    // this.dummy.scale.set(0, 0, 0)
+    // for (let i = 0; i < maxInstances; i++) {
+    //   this.dummy.updateMatrix()
+    //   this.instancedMesh.setMatrixAt(i, this.dummy.matrix)
+    //   this.freeIndices.push(i)
+    // }
+    //
+    // this.instancedMesh.instanceMatrix.needsUpdate = true
   }
 
   dispose() {
-    this.viewport.scene.remove(this.instancedMesh)
-    this.instancedMesh.geometry.dispose()
-
-    if (this.instancedMesh.material) {
-      if (Array.isArray(this.instancedMesh.material)) {
-        this.instancedMesh.material.forEach(mat => mat.dispose())
-      } else {
-        this.instancedMesh.material.dispose()
-      }
+    for (const block of this.blocks) {
+      block.dispose()
     }
-
-    this.instancedMesh.dispose()
     this.__uuidMap.clear()
-    this.__indexIdMap.clear()
-    this.freeIndices.length = 0
+    this.blocks.length = 0
   }
 }
 
 export class PointManageWrap {
   readonly manager: InstancePointManager
-  meshIndex: number = -1
+  readonly blockIndex: number = -1
+  readonly meshIndex: number = -1
   parent: THREE.Object3D | null = null
 
   uuid: string
@@ -234,8 +272,9 @@ export class PointManageWrap {
     return false
   }
 
-  constructor(pointManager: InstancePointManager, data: any, meshIndex: number = -1) {
+  constructor(pointManager: InstancePointManager, blockIndex: number, meshIndex: number, data: any) {
     this.manager = pointManager
+    this.blockIndex = blockIndex
     this.meshIndex = meshIndex
     _.extend(this, data)
   }
@@ -243,7 +282,6 @@ export class PointManageWrap {
   dispose() {
     this.manager.deletePoint(this.uuid)
     this.parent = null
-    this.meshIndex = -1
   }
 
   applyMatrix4(matrix: THREE.Matrix4): PointManageWrap {
@@ -260,7 +298,8 @@ export class PointManageWrap {
   }
 
   createBox3(): THREE.Box3 {
-    const instancedMesh = this.manager.instancedMesh
+    const instancedMesh = this.manager.blocks[this.blockIndex]?.instancedMesh
+
     const matrix = new THREE.Matrix4()
     instancedMesh.getMatrixAt(this.meshIndex, matrix)
     // 创建包围盒并应用矩阵
diff --git a/src/example/ExampleUtil.js b/src/example/ExampleUtil.js
index 391cefa..f91f25a 100644
--- a/src/example/ExampleUtil.js
+++ b/src/example/ExampleUtil.js
@@ -83,7 +83,6 @@ export function buildRackPerformanceData(rows, cols) {
     }
   }
 
-  debugger
   return Array.from(data.values())
 }
 
diff --git a/src/example/example1.js b/src/example/example1.js
index 4e777bb..53b83d5 100644
--- a/src/example/example1.js
+++ b/src/example/example1.js
@@ -395,7 +395,7 @@ export default {
     },
     {
       catalogCode: '__f2', t: 'floor',
-      items: buildPointPerformanceData('carton', 100, 100)
+      items: buildPointPerformanceData('carton', 200, 500)
     },
     {
       catalogCode: '__f3', t: 'floor',
diff --git a/src/modules/carton/CartonRenderer.ts b/src/modules/carton/CartonRenderer.ts
index 80c53a2..5028d53 100644
--- a/src/modules/carton/CartonRenderer.ts
+++ b/src/modules/carton/CartonRenderer.ts
@@ -69,7 +69,7 @@ export default class PalletRenderer extends BaseRenderer {
         this.tempViewport,
         this.cartonGeometry,
         this.cartonMaterial,
-        Constract.MAX_PALLET_INSTANCES)
+        true, true)
     )
   }
 
diff --git a/src/modules/gstore/GstoreRenderer.ts b/src/modules/gstore/GstoreRenderer.ts
index 498bde3..f68e100 100644
--- a/src/modules/gstore/GstoreRenderer.ts
+++ b/src/modules/gstore/GstoreRenderer.ts
@@ -55,7 +55,7 @@ export default class GstoreRenderer extends BaseRenderer {
         this.tempViewport,
         this.pointGeometry,
         this.pointMaterial,
-        Constract.MAX_GSTORE_INSTANCES)
+        true, true)
     )
   }
 
diff --git a/src/modules/measure/MeasureRenderer.ts b/src/modules/measure/MeasureRenderer.ts
index da57375..d8d1b5d 100644
--- a/src/modules/measure/MeasureRenderer.ts
+++ b/src/modules/measure/MeasureRenderer.ts
@@ -93,7 +93,7 @@ export default class MeasureRenderer extends BaseRenderer {
         this.tempViewport,
         this.pointGeometry,
         this.pointMaterial,
-        Constract.MAX_MEASURE_INSTANCES)
+        true, true)
     )
   }
 
diff --git a/src/modules/pallet/PalletRenderer.ts b/src/modules/pallet/PalletRenderer.ts
index 23cfe01..88f357a 100644
--- a/src/modules/pallet/PalletRenderer.ts
+++ b/src/modules/pallet/PalletRenderer.ts
@@ -57,7 +57,7 @@ export default class PalletRenderer extends BaseRenderer {
         this.tempViewport,
         this.palletGeometry,
         this.palletMaterial,
-        Constract.MAX_PALLET_INSTANCES)
+        true, true)
     )
   }
 
diff --git a/src/modules/tote/ToteRenderer.ts b/src/modules/tote/ToteRenderer.ts
index 5565f36..9bdd40f 100644
--- a/src/modules/tote/ToteRenderer.ts
+++ b/src/modules/tote/ToteRenderer.ts
@@ -59,7 +59,7 @@ export default class PalletRenderer extends BaseRenderer {
         this.tempViewport,
         this.toteGeometry,
         this.toteMaterial,
-        Constract.MAX_PALLET_INSTANCES)
+        true, true)
     )
   }
 
diff --git a/src/modules/way/WayRenderer.ts b/src/modules/way/WayRenderer.ts
index 35d6ce3..58207fd 100644
--- a/src/modules/way/WayRenderer.ts
+++ b/src/modules/way/WayRenderer.ts
@@ -206,7 +206,7 @@ export default class WayRenderer extends BaseRenderer {
         this.tempViewport,
         this.lineGeometry,
         this.lineMaterial,
-        Constract.MAX_WAY_LINE_INSTANCES)
+        false, false)
     )
   }
 
@@ -220,7 +220,7 @@ export default class WayRenderer extends BaseRenderer {
         this.tempViewport,
         this.pointGeometry,
         this.pointMaterial,
-        Constract.MAX_WAY_INSTANCES)
+        true, true)
     )
   }
 
@@ -234,7 +234,7 @@ export default class WayRenderer extends BaseRenderer {
         this.tempViewport,
         this.dirGeometry,
         this.dirMaterial,
-        Constract.MAX_WAY_LINE_INSTANCES)
+        false, false)
     )
   }
 }