To effectively evaluate the effects of three kinds of active laser jamming modes of angle deception, high-repetition-frequency deception and high-repetition-frequency suppression, we made a ballistic simulation of the three jamming modes by taking a certain proportional guidance missile with over-gravity compensation as the research object. The main mathematical models were established, including the models of laser energy density, laser atmospheric transmittance, the view angle of seeker with proportion guidance, the seeker energy tracking, the seeker generating the proportional guidance law with over-gravity compensation, and missile control law, which constituted a closed-loop simulation system by using missile kinematic and dynamic equations. Then, the setting position and setting distance of jammer and the jamming laser energy were taken as simulation variables, and the full ballistic simulation of the three kinds of active laser jamming was completed.Simulation results show that: lateral setting of the jammer, the appropriate increasing of the setting distance and the increasing of the jamming energy can increase the miss distance and achieve a good jamming effect. The simulation system can provide a platform for the effect evaluation of electro-optical countermeasure and a reference for the tactical application of weapons.