First of all,the 3Dmodeling of spiral bevel gear is conducted by using SolidWorks software.Then,based on Hertz contact theory,a virtual prototype model of spiral bevel gear for forklift main reducer is established by using ADAMS,through simulation experiment,and the change curve of gear meshing force amplitude fluctuations with the center distance change is got.Finally,through the inserting point method taking three typical installation,the further analysis of the dynamic meshing characteristic is carried out.By contrast,the control range of center distance of transmission stability more reasonable installation error is got and the optimal installation center distance is got,it can reduce vibration and improve the quality of gear meshing,the reference for the optimization design of installation center distance of the spiral bevel gear is provided.