A calculation model of NGW type planetary gear transmission is established.Considering gear manufacturing and assembling errors

load coefficient of the system is computed by using the theory of equivalent mesh error and the influence of load sharing coefficient on different floating components and errors is analyzed.The analysis results indicate that the floating component has a performance of load sharing

and two components combined floating is helpful to improve load sharing than single floating.Gear manufacturing and assembling errors react on the load sharing and the sun gear error influences the load sharing greatly.