It is composed of angle iron, connecting piece, gas spring, force receiving piece and parallel piece. The angle iron is connected with the gas spring, the force receiving piece is connected with the connecting piece, and the parallel piece is connected with the angle iron through the connecting piece and the force piece, and the two ends of the gas spring are respectively connected with the angle iron and the force piece. This product has the advantages of simple structure, easy operation, ergonomic requirements, light weight and durability, high strength of the lifter and not easy to damage. This product is made of high-strength and high-toughness steel. It is suitable for functional accessories such as functional sofa, high box bed, low box bed and software bed.