diff --git a/nodes.py b/nodes.py
index 934ea6e..702c8dd 100644
--- a/nodes.py
+++ b/nodes.py
@@ -1,6 +1,30 @@
 from typing import Any as any_type
 from comfy import model_management
 
+# 尝试导入pynvml库，如果没有安装则提供相应提示
+try:
+    import pynvml
+    pynvml_installed = True
+    pynvml.nvmlInit()
+except ImportError:
+    pynvml_installed = False
+    print("警告：未安装pynvml库，auto选项将不可用。")
+
+def get_gpu_memory_info():
+    """获取GPU显存信息"""
+    if not pynvml_installed:
+        return None, None
+
+    try:
+        handle = pynvml.nvmlDeviceGetHandleByIndex(0)
+        memory_info = pynvml.nvmlDeviceGetMemoryInfo(handle)
+        total = memory_info.total / (1024 * 1024 * 1024)  # 转换为GB
+        used = memory_info.used / (1024 * 1024 * 1024)    # 转换为GB
+        return total, used
+    except Exception as e:
+        print(f"获取GPU信息出错: {e}")
+        return None, None
+
 class AlwaysEqualProxy(str):
     def __eq__(self, _):
         return True
@@ -8,6 +32,7 @@ class AlwaysEqualProxy(str):
     def __ne__(self, _):
         return False
 any_type = AlwaysEqualProxy("*")
+
 class ReservedVRAMSetter:
     @classmethod
     def INPUT_TYPES(s):
@@ -18,8 +43,12 @@ class ReservedVRAMSetter:
                     "default": 1.0,
                     "min": 0.6,
                     "step": 0.1,
-                    "display": "reserved (GB)" 
+                    "display": "reserved (GB)"
                 }),
+                "mode": (["manual", "auto"], {
+                    "default": "auto",
+                    "display": "Mode"
+                })
             },
             "hidden": {"unique_id": "UNIQUE_ID", "extra_pnginfo": "EXTRA_PNGINFO"}
         }
@@ -29,9 +58,27 @@ class ReservedVRAMSetter:
     OUTPUT_NODE = True
     FUNCTION = "set_vram"
     CATEGORY = "VRAM"
-    def set_vram(self, anything, reserved, unique_id=None, extra_pnginfo=None):
-        model_management.EXTRA_RESERVED_VRAM = int(reserved * 1024 * 1024 * 1024)
-        print(f'set EXTRA_RESERVED_VRAM={reserved}GB')
+
+    def set_vram(self, anything, reserved, mode="auto", unique_id=None, extra_pnginfo=None):
+        if mode == "auto":
+            if pynvml_installed:
+                total, used = get_gpu_memory_info()
+                if total and used:
+                    # 自动计算预留显存：使用当前已用显存+reserved设置值作为预留值
+                    auto_reserved = used + reserved
+                    model_management.EXTRA_RESERVED_VRAM = int(auto_reserved * 1024 * 1024 * 1024)
+                    print(f'set EXTRA_RESERVED_VRAM={auto_reserved:.2f}GB (自动模式: 总显存={total:.2f}GB, 已用={used:.2f}GB)')
+                else:
+                    model_management.EXTRA_RESERVED_VRAM = int(reserved * 1024 * 1024 * 1024)
+                    print(f'set EXTRA_RESERVED_VRAM={reserved}GB (自动模式失败，使用手动值)')
+            else:
+                model_management.EXTRA_RESERVED_VRAM = int(reserved * 1024 * 1024 * 1024)
+                print(f'set EXTRA_RESERVED_VRAM={reserved}GB (pynvml未安装，auto选项不可用)')
+        else:
+            # 手动模式
+            model_management.EXTRA_RESERVED_VRAM = int(reserved * 1024 * 1024 * 1024)
+            print(f'set EXTRA_RESERVED_VRAM={reserved}GB (手动模式)')
+
         return (anything,)
 
 NODE_CLASS_MAPPINGS = {
@@ -39,4 +86,4 @@ NODE_CLASS_MAPPINGS = {
 }
 NODE_DISPLAY_NAME_MAPPINGS = {
     "ReservedVRAMSetter": "Set Reserved VRAM(GB) ⚙️"
-}
+}
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..4365be3
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1 @@
+pynvml
\ No newline at end of file