Air-to-surface strike is a valid means of capturing the air superiority and supporting the ground troops. For validly analyzing effectiveness of attacker, on the base of aviation weapon performance index and the combat background of breaking through enemy anti-air firepower, the WSEIAC model of strike for attacker and the method of settling the model parameters at the angle of actual combat are put forward. A basic process of the effectiveness evaluation is given and an analysis of living example is made. The result indicates that various factors affecting the system effectiveness are fully considered and the established model can objectively describe the essence of air-to- surface strike combat for attacker and can give a reference to the battle commanders.