According to the technical requirements and basic technical parameters, structural analysis of feeding mechanism of candy packaging machine was carried out using analytical method. Kinematics of crank rocker of the feeding mechanism was calculated theoretically using closed vector method. Modeling and simulation analysis was carried out using Adams software. Optimization was carried out using Adams software based on analysis. Optimal solution of design variables were obtained using minimum pressure angle as the objective function, the length relationship between crank and rocker and rocker angle 24. 4°as the constraints, and crank, rocker, crank angle as design variables.