In order to study the influence of attack angle on aerodynamic characteristics of a super caliber fin stabilized projectile of tank gun, providing refereces for analysis of ballistic condition of fuze, the aerodynamic characteristic parameters of the projectile were got by FLUENT. The analysis shows that quadratic function can be used to describe the drag coefficient C_D of projectile varying with attack angle and the attack angle coefficient is 13.0~16.8. In subsonic and transonic region, the cubic function is more suitable to describe the lift coefficient C_L and the pitching moment coefficient C_mz of the projectile varying with attack angle. In supersonic region, linear function and cubic function are both appropriate.