Safety valve capable of improving stability and accuracy of pressure release

The invention discloses a safety valve capable of improving stability and accuracy of pressure release, and relates to the technical field of safety valves. The valve comprises a valve body, a movable valve rod is installed in the valve body, the top of the valve body is fixedly connected with a U-shaped frame, one side of the U-shaped frame is rotationally connected with a top plate used for manually controlling the valve rod, one side of the U-shaped frame is rotationally connected with a manual rod used in cooperation with the top plate, and an air inlet pipe for air inlet is arranged at the bottom of the valve body. An air outlet pipe for air outlet is arranged on one side of the valve body, and a stabilizing mechanism is arranged on the circumference of the air outlet pipe. The stability of exhausted gas can be improved, the knocking condition of a pipeline connected with the gas can be prevented, meanwhile, the manual rod can be jacked up through the top frame, then exhaust is conducted, the use safety