The invention provides an explosion venting valve. The explosion venting valve comprises a valve body and the automatic pressure control system arranged on the valve body. The pressing pressure is adjusted quantitatively, controlled automatically and monitored through the automatic pressure control system. By means of the explosion venting valve, automatic control over explosion venting pressure is achieved, so that the explosion venting valve can be reused many times and rest automatically, explosion energy and pollutants are prevented after explosion venting, and harm and pollution caused by secondary explosion are reduced effectively.