Fixing device for circuit board for electric vehicle

The utility model discloses a fixing device for a circuit board for an electric vehicle, which comprises a top plate frame, a protective airbag cushion is fixedly connected to the center of the top plate frame, a bottom plate frame is fixedly connected to the lower end of the top plate frame, and a protective arc frame is fixedly connected to the rear end of the bottom plate frame. A connecting end frame is fixedly connected to the front end position of the top plate frame, a wiring frame is fixedly connected to the center position of the front end of the top plate frame, and an adjusting structure is arranged at the position of an inner cavity of the top plate frame and comprises a threaded rod, a displacement frame, a limiting plate frame, a motor, a spring fastening frame, a supporting inclined clamping plate, a bottom limiting plate and an inserting rod. The top end of the displacement frame and a limiting plate frame are arranged in a limiting sliding mode, the front end of the limiting plate frame is fi