The number of attitude control pulse engine is small. For making full use of pulse, reducing the effect of jet on projectile, appropriate ignition time and ignition logic is the key for control system research. Take the PAC-3 missile layout as an example, the attitude control pulse engine's operational factor and fire condition were analyzed, based on superposition of the lateral force and torque, the pulse engine's fire logic was synthesized using Matlab simulation. The simulation was carried on the vertical plane, the number of the pulse engine which producing direct force and the torque, as well as the trajectory diagram of missile and target were given. The result proved the direct force effectiveness and fire logic accuracy.