Abstract: According to the crane lift device problems of the chain length can't be adjusted and the hydraulic support rocked wildly in lifting and crane break easily, a new device scheme use chain wheel to replace crane is proposed. This paper research the meshing behavior of chain wheel used to lift device and adaptability of half chain wheel used to heavy lifting. The processing technology and the method of calibration about chain wheel is given, also optimized the parameters of lift mechanism, the new chain wheel lift device has been applied well in practice.