Attitude vibration of airborne early warning radar has an adverse impact on target detection performance. Considering the attitude vibration of aircraft for installing airborne early warning radar under rigid body model condition, the aircraft crabbing and rolling models are set up, and then the effects of these two kinds of attitude vibration on clutter spectrum and target echo power is analyzed. Finally, based on single-channel signal processing, the target detection probability under the influence of both crabbing and rolling is obtained by simulation. The results show that: 1)Both crabbing and rolling reduce the detection probability, and the rolling having a more significant influence than crabbing;and 2)When the vibration angle of attitude exceeds a certain value, the radar will lose the capability of target detection.