The utility model discloses a pressure relief buffer device for a safety valve of a drilling pump. The upper part of the relief buffer device of the drilling pump safety valve is connected with the drilling pump safety valve. There are four buffer plates in the pressure relief buffer device of the safety valve of the drilling pump, and the lower ends are connected with the water chamber of the drilling pump through bent steel pipes. When the safety valve of the drilling pump is opened, high-pressure drilling fluid enters the pressure relief buffer device of the safety valve of the drilling pump. Under the buffer of the buffer plate, the high-pressure drilling fluid slows down the pressure, changes the flow direction and velocity of the high-pressure drilling fluid, enters the water supply room through the bent steel pipe connected with the pressure relief buffer device of the safety valve of the drilling pump, and finally enters the drilling fluid tank. The device is simple in structure and convenient to install, which can effectively solve the problem that when the safety valve of the drilling pump releases pressure, high-pressure drilling fluid directly enters the upper liquid pipeline of the drilling pump, causing the upper liquid pipeline of the drilling pump to impact and burst, and at the same time solve the problems that the upper liquid pipeline bursts, causing the drilling fluid to leak, polluting the environment and injuring people.