Arm support for neurosurgery

The utility model discloses an arm support for a neurosurgery operation. The arm support comprises an arm support body and fixing mechanisms. Wherein the arm support body comprises an upper plate; a supporting plate A is arranged on one side of the upper surface of the upper plate; supporting rods are fixedly connected to the front end and the rear end of the lower surface of the supporting plateA; a spring is arranged at one end of the outer surface of the supporting rod and fixedly connected with the supporting plate A. A fixing block is fixedly connected to the lower end of the supportingrod, a sliding block is arranged in the middle of the outer surface of the supporting rod and fixedly connected with the spring, and a steel ball is rotatably connected to the lower surface of the sliding block. By designing the movable supporting plate A, the spring, the supporting rod, the sliding block and the fixing block which are installed on the upper plate, the distance between the supporting plate A and the suppor