Aiming for the cluster eyes, as the rudiment of compound eye, the scheme for calibrating multichannel imaging distortion was presented for target positioning. According to the mathematical models of positioning target and multichannel calibration, by the optical splitter, the verticality between horizontal movement axle of target plane and target plane and the parallelity between target plane and cluster eyes plane were adjusted firstly. After the methods of vanishing points and the common imaging point of different points on the Y-axis were used to obtain initial point and distance, three-dimensional coordinate of every point located on the target plane could be obtained. Finally, after getting the angle between every target and corresponding channels and its imaging center, the corresponding relation between angle of each channel and the imaging center was established. The experimental results show that the scheme can meet the requirement for nonlinear calibration of cluster eyes, and the calibrated angle resolution initially could reach 0.02° and the distance precision for target positioning could be controlled within less than 3%.