Safety relief valve

The invention provides a safety relief valve. The inner wall of the end, close to a valve body, of a pressure release pipe is connected with a circular ring, a first sealing plug capable of moving left and right to seal the circular ring or open the circular ring for pressure release is installed in the pressure release pipe, and an auxiliary pressure release device used for rapid pressure releasewhen the pressure is too large is installed on the inner wall, located above a connecting rod, of the valve body. When the air pressure in equipment reaches a certain value, a valve clack is pushed to move upwards, high-pressure gas is exhausted into the valve body, the connecting rod moves upwards along with the valve clack, and a push rod is driven to swing upwards, so that a push plate is pushed to extrude a pressed rod, the first sealing plug moves accordingly and is separated from the circular ring, and pressure release of the high-pressure gas from the pressure release pipe is realized;and when the air pressure