diff --git a/lib/core/TypeAnnotationResolver.py b/lib/core/TypeAnnotationResolver.py
index b2fcec4..44d496b 100644
--- a/lib/core/TypeAnnotationResolver.py
+++ b/lib/core/TypeAnnotationResolver.py
@@ -131,10 +131,21 @@ class TypeAnnotationResolver:
             SymbolTable: 符号表字典
         """
         if isinstance(Node, ast.BinOp) and isinstance(Node.op, ast.BitOr):
-            Line: int = getattr(Node, 'lineno', 0) or 0
-            raise TypeError(
-                f"[TPC] 不支持类型联合 'T1 | T2'（第 {Line} 行）；"
-                f"类型注解只能是单一类型：指针请写 CPtr[T]，修饰符请用关键字")
+            def _is_none_literal(n: ast.AST) -> bool:
+                if isinstance(n, ast.Constant):
+                    return getattr(n, 'value', ...) is None
+                return isinstance(n, ast.Name) and getattr(n, 'id', '') == 'None'
+
+            _left_none: bool = _is_none_literal(Node.left)
+            _right_none: bool = _is_none_literal(Node.right)
+            if _left_none != _right_none:
+                # `T | None` / `None | T` 等价于 T
+                Node = Node.right if _left_none else Node.left
+            else:
+                Line: int = getattr(Node, 'lineno', 0) or 0
+                raise TypeError(
+                    f"[TPC] 不支持类型联合 'T1 | T2'（第 {Line} 行）；"
+                    f"类型注解只能是单一类型：指针请写 CPtr[T]，修饰符请用关键字")
         if isinstance(Node, ast.Constant):
             Info: CTypeInfo = TypeAnnotationResolver._from_node_constant(Node, SymbolTable)
         elif isinstance(Node, ast.Name):
diff --git a/lib/vast/ExprParser.py b/lib/vast/ExprParser.py
index de82adf..9dc42ef 100644
--- a/lib/vast/ExprParser.py
+++ b/lib/vast/ExprParser.py
@@ -1783,10 +1783,21 @@ class ExprParserMixin(TokenStream):
                     "[vast] 类型注解的修饰词后缺少类型（如 `x: const int`）。")
             return None
         if isinstance(expr, N.BinOp) and isinstance(expr.op, N.BitOr):
-            Line: int = getattr(expr, 'lineno', 0) or 0
-            raise TypeError(
-                f"[TPC] 不支持类型联合 'T1 | T2'（第 {Line} 行）；"
-                f"类型注解只能是单一类型：指针请写 CPtr[T]，修饰符请用关键字")
+            def _is_none_literal(n: N.AST) -> bool:
+                if isinstance(n, N.Constant):
+                    return getattr(n, 'value', ...) is None
+                return isinstance(n, N.Name) and getattr(n, 'id', '') == 'None'
+
+            _left_none: bool = _is_none_literal(expr.left)
+            _right_none: bool = _is_none_literal(expr.right)
+            if _left_none != _right_none:
+                # `T | None` / `None | T` 等价于 T
+                expr = expr.right if _left_none else expr.left
+            else:
+                Line: int = getattr(expr, 'lineno', 0) or 0
+                raise TypeError(
+                    f"[vast] 不支持类型联合 'T1 | T2'（第 {Line} 行）；"
+                    f"类型注解只能是单一类型：指针请写 CPtr[T]，修饰符请用关键字")
         if self._AtPtrSuffix(expr):
             expr = self._ConsumePtrSuffix(expr)
         tok: Token = self._Peek()