Because of inertia and changing load, the angular velocity fluctuation of constant speed motor (CSM) was generated in hybrid mechanism, and the precision of output trajectory was reduced. The control strategy which applies servo motor tracking velocity of CSM was put forward, for CSM was uncontrollable. The control platform of hybrid machine was presented. The fuzzy controller was designed by means of the control scheme, and the velocity fluctuation was compensated for accurate implementation given trajectory. The result of experiment indicates that the fuzzy controller was feasible and effective.