On account of the operating conditions, design and development difficulties of the high pressure level forgedsteel gate valve used for hydrogenation device, the general structure of valve body, packing system and sealing filler detection system were designed. The key processes about raw material incoming inspection, welding, corresponding design of sealing test equipment were controlled. Pressure test results and customers using effect show that the developed high pressure level forgedsteel gate valve used for hydrogenation device can adapt to the harsh operating conditions. Also the main design parameters, design specification and pressure testing of the high pressure level forgedsteel gate valve were illustrated.