The driving system of the gear rack climbing type ship lift requires accurate positioning and installation under the loading condition,and can adapt to the structural deformation of the chamber under the empty chamber condition.Considering the main longitudinal beam,cross girder for safety mechanism,cross girder for driving,chamber gate,pinion bracket assembly,synchronous shaft system and other structures,we establish the finite element model of the chamber and driving system of 200 m-grade gear rack climbing type ship lift,analyze the deformation of the chamber structure and the installation position of the driving system under the three conditions including the bottom support of the chamber,the suspended of the chamber(4.7 m water depth) and the suspended of the chamber (empty),and propose the optimization suggestions.The results show that the deflection of the main structure of the chamber is within the allowable range during installation,there is a height difference between the inner and outer main reducer bases,the deformation difference between the two ends of the synchronous shaft III is large,and the deformation of the part of the end of the synchronous shaft IV close to the center of the chamber is large.It is recommended that the base of the inner main reducer should be raised by 5.16 mm.The base of the bevel gear box near the chamber center of the synchronous shaft III shall be raised by 10.49 mm.The fixed self-aligning bearing base and bevel gear box base close to the synchronous shaft IV shall be raised by 24.32 mm.