The bed box lift by connecting angle iron, iron, gas spring, force plate, fixed flat iron.Iron is connected with the gas spring force piece is connected with the fixed flat iron and iron, and iron stress sheet and fixed flat iron is connected to both ends of the gas spring with angle and force plate connected. I plant products has the advantages of simple structure, convenient operation, high durability, lifting strength and not easy to damage. The bed box lift divided by the length of 0.85 meters, 1 meters and 1.08 meters 1.1 meters; according to the pressure size of 50 kg, 70 kg, 80 kg, 90 kg. According to the type of steel plate and angle steel bending points. The surface derusting after spraying environmental plastic powder, plastic powder has a variety of colors, generally God gray, light gray, black, silver.