Novel safety valve for high-pressure natural gas

The utility model belongs to the technical field of safety valves, and particularly relates to a novel safety valve for high-pressure natural gas, which adopts the technical scheme that the novel safety valve comprises a valve body, a hand wheel, a connecting plate and a clamping mechanism arranged on the surface of the valve body, the hand wheel is rotationally connected inside the valve body, and the side surface of the hand wheel is fixedly connected with the connecting plate; the clamping mechanism comprises a transmission assembly and a clamping assembly, the transmission assembly comprises a lead screw, a lifting plate, a connecting plate and a sliding rod, the lead screw is rotationally connected to the surface of the valve body, the lifting plate is in threaded connection with the surface of the lead screw, and the lead screw can drive the lifting plate in threaded connection with the lead screw to descend by arranging a clamping block and the rotatable lead screw; and the sliding rod is embedded into