In this paper,the model of oblique incident angle on reflected wave power of “cat-eye” target is built,moreover the geometrical reflect model of “cat eye” target when the reflected plane and the focal plane is coplanar or not.The scope of incident angle is educed when the focal shift is positive and negative.The reflected wave angle and effective received area are educed which are induced by the focal shift.The formula of the reflected wave power is educed which is induced by the incident angle and focal shift.The effect of the incident angle and focal shift on the reflected wave power of “cat-eye” target is analyzed.The study reveals that:the change of incident angle and focal shift both result in the change of the reflected wave angle and effective received area “cat-eye” target,then induce the change of the reflected wave power.Only the incident angle which meets the limited condition can induce the reflected wave power,the argument of the incident angle and focal sift reduce the reflected wave power,and the change of focal shift has a prominent effect on the reflected power,when the incident angle and the focal shift become zero,the reflected wave power reaches the peak value.