diff --git a/SourceCode/Code2026/CoreLibrary/AecDbX3dPart.cpp b/SourceCode/Code2026/CoreLibrary/AecDbX3dPart.cpp
index 1d0dc88..ade4a5e 100644
--- a/SourceCode/Code2026/CoreLibrary/AecDbX3dPart.cpp
+++ b/SourceCode/Code2026/CoreLibrary/AecDbX3dPart.cpp
@@ -48,6 +48,7 @@ AecDbX3dPart::AecDbX3dPart(void)
 	m_nBoolOper = 0;
 	m_pSolidDraw = NULL;
 	m_pSolid = NULL;
+	m_bDirty = true;
 	m_sName = _T("");
 	m_sGUID = IDCreate();
 	m_bActive = false;
@@ -60,6 +61,7 @@ AecDbX3dPart::AecDbX3dPart(const AecDbX3dPart& pPart)
 {
 	m_pSolidDraw = NULL;
 	m_pSolid = NULL;
+	m_bDirty = true;
 
 	m_sName = pPart.m_sName;
 	m_sGUID = pPart.m_sGUID;
@@ -150,6 +152,7 @@ void AecDbX3dPart::ReCreateGUID()
 
 void AecDbX3dPart::AddX3dSolid(AcDbX3dSolid* pXSolid,AcDb::BoolOperType bType  /*AcDb::kBoolUnite*/,bool bForHouseSub /*= false*/)
 {
+	m_bDirty = true;
 	if (bType == AcDb::kBoolUnite)
 	{
 		m_arX3DSolidPtrsUnite.append(pXSolid);
@@ -169,6 +172,7 @@ void AecDbX3dPart::AddX3dSolid(AcDbX3dSolid* pXSolid,AcDb::BoolOperType bType  /
 
 void AecDbX3dPart::SetOrgPoint(const AcGePoint3d& ptOrg)
 {
+	m_bDirty = true;
 	m_ptOrg = ptOrg;
 }
 
@@ -467,6 +471,7 @@ bool AecDbX3dPart::GetActiveInf(CPoint& ptRC) const
 
 void AecDbX3dPart::RemoveAll3dSolidRec()
 {
+	m_bDirty = true;
 	AcDbX3dSolid* pXSolid = NULL;
 	for (int i = 0;i < m_arX3DSolidPtrsUnite.length();i++)
 	{
@@ -503,6 +508,7 @@ void AecDbX3dPart::RemoveAll3dSolidRec()
 
 void AecDbX3dPart::RemoveAt(int nIndex,AcDb::BoolOperType bType/* = AcDb::kBoolUnite*/,bool bForHouseSub/* = false*/)
 {
+	m_bDirty = true;
 	AcDbX3dSolid* pXSolid = NULL;
 	if (bForHouseSub)
 	{
@@ -581,6 +587,7 @@ AcDbX3dSolid* AecDbX3dPart::GetX3dSolid(int nIndex,AcDb::BoolOperType bType/* =
 
 bool AecDbX3dPart::SetAxis(int nIndex,const AcGeVector3d& vtAxis)
 {
+	m_bDirty = true;
 	if (nIndex >= 0 && nIndex < MAX_AXISROTATS)
 	{
 		m_arVtAxis.setAt(nIndex,vtAxis);
@@ -607,6 +614,7 @@ void AecDbX3dPart::SetHideShow( )
 
 void AecDbX3dPart::SetHide(bool bHide)
 {
+	m_bDirty = true;
 	m_mapXData.SetAt(_T("Hide"),bHide ? 1 : 0);
 }
 
@@ -622,6 +630,7 @@ bool AecDbX3dPart::IsHide() const
 
 void AecDbX3dPart::PeelOffTheSkin(int nPos)
 {
+	m_bDirty = true;
 	m_nPeelOff = nPos;
 
 	if (m_pSolidDraw != NULL)
@@ -638,11 +647,13 @@ bool AecDbX3dPart::IsPeelOffTheSkin() const
 
 void AecDbX3dPart::SetActive(bool bActive)
 {
+	m_bDirty = true;
 	m_bActive = bActive;
 }
 
 void AecDbX3dPart::AddMove(const AcGeVector3d& vtMove)
 {
+	m_bDirty = true;
 	m_vtMove += vtMove;
 
 	if (m_pSolidDraw != NULL)
@@ -654,6 +665,7 @@ void AecDbX3dPart::AddMove(const AcGeVector3d& vtMove)
 
 void AecDbX3dPart::AddMove(const AcGeMatrix3d& xMirror)
 {
+	m_bDirty = true;
 	m_vtMove += xMirror.translation();
 
 	if (m_pSolidDraw != NULL)
@@ -670,6 +682,7 @@ AcGeVector3d AecDbX3dPart::GetMove() const
 
 void AecDbX3dPart::ResetMove()
 {
+	m_bDirty = true;
 	m_vtMove = AcGeVector3d::kIdentity;
 
 	if (m_pSolidDraw != NULL)
@@ -681,6 +694,7 @@ void AecDbX3dPart::ResetMove()
 
 void AecDbX3dPart::AddRotate(int nAxisIndex,double dRot)
 {
+	m_bDirty = true;
 	if (nAxisIndex >= 0 && nAxisIndex <= MAX_AXISROTATS )
 	{
 		m_dAxisRotats[nAxisIndex] += dRot;
@@ -704,6 +718,7 @@ double AecDbX3dPart::GetRotate(int nAxisIndex) const
 
 void AecDbX3dPart::ResetRotate(int nAxisIndex)
 {
+	m_bDirty = true;
 	if (nAxisIndex >= 0 && nAxisIndex < MAX_AXISROTATS)
 	{
 		m_dAxisRotats[nAxisIndex] = 0.0;
@@ -765,6 +780,7 @@ void AecDbX3dPart::Transformby(AcGeVector3d& vt) const
 
 void AecDbX3dPart::SetBoolOperFor(int nOper)
 {
+	m_bDirty = true;
 	m_nBoolOper = nOper;
 }
 
@@ -785,6 +801,16 @@ const AecDbObjXDataMap* AecDbX3dPart::GetSpecialtyData() const
 
 bool AecDbX3dPart::Create()
 {
+	//显式调用一律重建：外部可能直接改过 x3dsolid（如对 GetX3dSolid(0)
+	//调 TransformBy 后再 Create），部件无法感知，只能无条件重算
+	return Rebuild();
+}
+
+bool AecDbX3dPart::Rebuild()
+{
+	//先清标志再重建，避免构建过程中再次触发 EnsureCreated 造成递归
+	m_bDirty = false;
+
 	if (m_pSolid != NULL)
 		DELETE_PTR(m_pSolid);
 
@@ -900,8 +926,18 @@ bool AecDbX3dPart::Create()
 	return true;
 }
 
+bool AecDbX3dPart::EnsureCreated() const
+{
+	if (!m_bDirty && m_pSolid != NULL)
+		return true;
+
+	return const_cast<AecDbX3dPart*>(this)->Rebuild();
+}
+
 int AecDbX3dPart::GetForHouseSubtract(AcDbVoidPtrArray& arSolidPtrs) const
 {
+	EnsureCreated();
+
 	AcDbX3dSolid* pXSolid = NULL;
 
 	AcGePoint3d ptOrg = m_ptOrg;
@@ -939,6 +975,8 @@ int AecDbX3dPart::GetForHouseSubtract(AcDbVoidPtrArray& arSolidPtrs) const
 
 AcDb3dSolid* AecDbX3dPart::CreateDraw3dSolid() const
 {
+	EnsureCreated();
+
 	AcDb3dSolid* pDraw = NULL;
 	if (m_pSolid != NULL)
 	{
@@ -968,6 +1006,8 @@ Acad::ErrorStatus AecDbX3dPart::Draw2d(AcGiDraw &dc) const
 
 Acad::ErrorStatus AecDbX3dPart::Draw3d(AcGiDraw &dc) const
 {
+	EnsureCreated();
+
 	if (m_pSolidDraw == NULL)
 	{
 		m_pSolidDraw = CreateDraw3dSolid();
@@ -1102,6 +1142,8 @@ Acad::ErrorStatus AecDbX3dPart::getOsnapPoints(	AcDb::OsnapMode     osnapMode,
 											   AcGePoint3dArray&   snapPoints,
 											   AcDbIntArray&       geomIds) const
 {
+	EnsureCreated();
+
 	if (m_pSolidDraw != NULL)
 	{
 		m_pSolidDraw->getOsnapPoints(osnapMode,gsSelectionMark,pickPoint,lastPoint,viewXform,snapPoints,geomIds);
@@ -1188,6 +1230,7 @@ Acad::ErrorStatus AecDbX3dPart::dwgInFields (AcDbDwgFiler* pFiler)
 	pFiler->readBytes(m_dAxisRotats,sizeof(double) * MAX_AXISROTATS);
 	m_mapXData.dwgInFields(pFiler);
 
+	m_bDirty = true;	//开图时不建几何，首次绘制或取几何时再重建
 	return Acad::eOk;
 }
 
@@ -1254,6 +1297,7 @@ Acad::ErrorStatus AecDbX3dPart::dwgOutFields(AcDbDwgFiler* pFiler) const
 
 Acad::ErrorStatus AecDbX3dPart::CopyFrom(AecDbX3dPart* pSrcPart)
 {
+	m_bDirty = true;
 	if (pSrcPart == NULL)
 		return Acad::eInvalidInput;
 
diff --git a/SourceCode/Code2026/CoreLibrary/AecDbX3dPartEntity.cpp b/SourceCode/Code2026/CoreLibrary/AecDbX3dPartEntity.cpp
index f2ec803..ccac833 100644
--- a/SourceCode/Code2026/CoreLibrary/AecDbX3dPartEntity.cpp
+++ b/SourceCode/Code2026/CoreLibrary/AecDbX3dPartEntity.cpp
@@ -1821,7 +1821,7 @@ Acad::ErrorStatus AecDbX3dPartEntity::dwgInFields (AcDbDwgFiler* pFiler)
 		return (Acad::eMakeMeProxy) ;
 
 	m_pPart->dwgInFields(pFiler);
-	m_pPart->Create();
+	//开图时不建布尔结果：dwgInFields 里已置脏，首次绘制或取几何时由 EnsureCreated 重建
 
 	m_drawable2d.dwgInFields(pFiler, version);
 
diff --git a/SourceCode/Code2026/inc/AecDbX3dPart.h b/SourceCode/Code2026/inc/AecDbX3dPart.h
index 857c2dd..b695398 100644
--- a/SourceCode/Code2026/inc/AecDbX3dPart.h
+++ b/SourceCode/Code2026/inc/AecDbX3dPart.h
@@ -71,6 +71,7 @@ public:
 	int	 GetBoolOperFor() const;
 
 	bool Create();
+	bool EnsureCreated() const;
 	AcDb3dSolid* CreateDraw3dSolid() const;
 
 	int  GetForHouseSubtract(AcDbVoidPtrArray& arSolidPtrs) const;
@@ -117,6 +118,8 @@ public:
 
 protected:
 		
+	bool Rebuild();		//无条件重建布尔结果
+
 	//序列化
 	CString					m_sName;
 	CString					m_sGUID;
@@ -138,6 +141,7 @@ protected:
 	bool					m_bActive;		//活动状态
 	int						m_nPeelOff;		//是否需要剖开
 	AcDb3dSolid*			m_pSolid;		//原始solid元
+	bool                                    m_bDirty;       //参数已变更，几何待重建
 	mutable AcDb3dSolid*	m_pSolidDraw;	//临时绘制solid元
 	mutable SHJson::WValue	m_json;
 };