Abstract: Disadvantageous lateral jet interaction often occurs in a windward orientation with missile body-mounted thrusters. The disadvantageous phenomenon can be decreased with the wing tip-mounted thrusters. The interaction flowfield induced by the wing tip-mounted lateral jets was presented by numerical simulation. The N-S equations were solved by finite volume methods. The flow characteristics and amplification factors with flow parameters, such as Mach number, angle of attack, flight height were analyzed. The results show that the surface and spatial structures of interaction flowfield are complex for the wing tip-mounted lateral jets interaction. Although the jets are far from projectile, but the loads on the missile body, wing and fins have a significant impact, and the interaction region and intensity are obviously different on different flight conditions. The rule of amplification factors is complex, and presents nonlinear changes, and the range in which lateral jet control is effective obviously increasing. But the amplification factors on certain conditions have a large negative value, and it presents serious disadvantageous interaction.