In view of the control problem of terminal correction mortar projectiles subjected to lateral impulses, a control method based on miss distance prediction was proposed. The impulse control force and control torque were analyzed, and the controlled 6-degree-of-freedom motion equations were deduced. By using the deviation angle and its azimuth information between projectile and target measured by strapdown laser seeker, a miss distance prediction model was established. On this basis, the thruster working mode was designed, also, the methods of determining the number of thrusters needed and the direction of starting control were given. Simulation results indicated that the circular error probable (CEP) was reduced by 80%, and the mean miss distance of the controlled impact points was 7.85 m. It proved that the proposed control method could correct the trajectory deflections effectively and thus improve the hit precision.