The side force of missile at high angle-of-attack is very large due to asymmetric flows, so the research of asymmetric flows control is important. In the paper, the effect of vectoring jet on asymmetric flows over missile at high angle-of-attack was discussed. Flow visualization test was used in the study. Two sections of missile's head were selected in the study since their asymmetric flows were strong in the two sections. The effect of vectoring jet on asymmetric flows over sections of missile's head at high angle-of-attack was studied by means of laser lightsheet flow visualization test. The test shows: the asymmetric flows over missile can been controlled by vectoring jet.