diff --git a/app/models/__init__.py b/app/models/__init__.py
index 45d7ee4..87a3c57 100644
--- a/app/models/__init__.py
+++ b/app/models/__init__.py
@@ -3,7 +3,7 @@ from .user import User
 from .message import Message
 from .follow import Follow
 from .workspace import Workspace, WorkspaceMember
-from .project import ProjectNode
+from .project import ProjectItem
 from .library import LibraryItem
 from .interaction import ProjectLike, ProjectFavorite, ProjectShare
 
@@ -14,7 +14,7 @@ __all__ = [
     "Follow", 
     "Workspace", 
     "WorkspaceMember", 
-    "ProjectNode", 
+    "ProjectItem", 
     "LibraryItem",
     "ProjectLike",
     "ProjectFavorite",
diff --git a/app/models/interaction.py b/app/models/interaction.py
index 0ab3f92..625291e 100644
--- a/app/models/interaction.py
+++ b/app/models/interaction.py
@@ -5,7 +5,7 @@ from .base import AutoID, Base
 
 if TYPE_CHECKING:
     from .user import User
-    from .project import ProjectNode
+    from .project import ProjectItem
     from .workspace import Workspace
 
 class ProjectLike(Base, AutoID):
@@ -17,16 +17,16 @@ class ProjectLike(Base, AutoID):
         ForeignKey("users.id", ondelete="CASCADE"), 
         index=True
     )
-    project_node_id = Column(
-        String(ProjectNode.id_length()), 
-        ForeignKey("project_nodes.id", ondelete="CASCADE"), 
+    project_item_id = Column(
+        String(ProjectItem.id_length()), 
+        ForeignKey("project_items.id", ondelete="CASCADE"), 
         index=True
     )
     
     created_at = Column(DateTime(timezone=True), server_default=func.now())
 
     # 联合唯一约束，防止同一用户重复点赞
-    __table_args__ = (UniqueConstraint("user_id", "project_node_id", name="uq_user_project_like"),)
+    __table_args__ = (UniqueConstraint("user_id", "project_item_id", name="uq_user_project_like"),)
 
 
 class ProjectFavorite(Base, AutoID):
@@ -38,16 +38,16 @@ class ProjectFavorite(Base, AutoID):
         ForeignKey("users.id", ondelete="CASCADE"), 
         index=True
     )
-    project_node_id = Column(
-        String(ProjectNode.id_length()), 
-        ForeignKey("project_nodes.id", ondelete="CASCADE"), 
+    project_item_id = Column(
+        String(ProjectItem.id_length()), 
+        ForeignKey("project_items.id", ondelete="CASCADE"), 
         index=True
     )
     
     created_at = Column(DateTime(timezone=True), server_default=func.now())
 
     # 联合唯一约束，防止重复收藏
-    __table_args__ = (UniqueConstraint("user_id", "project_node_id", name="uq_user_project_favorite"),)
+    __table_args__ = (UniqueConstraint("user_id", "project_item_id", name="uq_user_project_favorite"),)
 
 
 class ProjectShare(Base, AutoID):
@@ -59,9 +59,9 @@ class ProjectShare(Base, AutoID):
         ForeignKey("users.id", ondelete="CASCADE"), 
         index=True
     )
-    project_node_id = Column(
-        String(ProjectNode.id_length()), 
-        ForeignKey("project_nodes.id", ondelete="CASCADE"), 
+    project_item_id = Column(
+        String(ProjectItem.id_length()), 
+        ForeignKey("project_items.id", ondelete="CASCADE"), 
         index=True
     )
     
diff --git a/app/models/project.py b/app/models/project.py
index 108b6f4..caa08b2 100644
--- a/app/models/project.py
+++ b/app/models/project.py
@@ -2,13 +2,13 @@ from sqlalchemy import Column, DateTime, String, ForeignKey, Integer
 from sqlalchemy.sql import func
 from .base import AutoID, Base
 
-class ProjectNode(Base, AutoID):
+class ProjectItem(Base, AutoID):
     """项目与文件夹的树状虚拟文件系统"""
-    __tablename__ = "project_nodes"
+    __tablename__ = "project_items"
 
     workspace_id = Column(String(32), ForeignKey("workspaces.id", ondelete="CASCADE"), index=True)
     # 自引用外键：如果是根目录下的顶级节点，则 parent_id 为 Null
-    parent_id = Column(String(32), ForeignKey("project_nodes.id", ondelete="CASCADE"), nullable=True, index=True)
+    parent_id = Column(String(32), ForeignKey("project_items.id", ondelete="CASCADE"), nullable=True, index=True)
     
     name = Column(String, nullable=False)
     # 节点类型：'folder' (文件夹) 或 'project' (代表具体文件的项目实体)