The work aims to research the influence of candy pusher’s dimension parameter error of candy packaging machine on its kinematic accuracy, and analyze the position, velocity and acceleration to find out the weak link of the pusher that affects the kinematic accuracy. The complex vector method and the differential method were used to analyze the error of its crank rocker and the sector gear mechanism on the basis of the independent action principle of the error. The position, velocity and acceleration errors of candy pusher fluctuated to some extent and had little effect on the dynamic performance. Rod 4 and slant angle had a relatively significant impact on the kinematic accuracy of the pusher. The error compensation was made for the scheme through calculation to reduce its amplitude of fluctuation. The large fluctuation of candy pusher of candy packaging machine can be avoided and the compensation design can be made for the unavoidable errors incurred, so as to improve the kinematic accuracy of the pusher.