The piezoelectric ceramic plate with high performance and large size of 100 mm×100 mm×0.5 mm has been prepared by the casting technique, and the preparation technique of a 8×8 array bimorph deformable mirror with piezoelectric ceramic plate was studied in this work. The theoretical and practical compensation and correction for aberrations of bimorph deformable mirror were investigated by the feedback control technology.The results showed that the aberrations amplitude of bimorph deformable mirror before correcting with feedback control technology was 2.664λ and RMS was 0.557λ, while after correcting, the aberrations amplitude was 0.36λ and RMS was0.095λ.There exist some differences between theoretically correcting (0.005λand RMS was 0) and practically correcting,which was caused by the following reason:unperfected gluing technology,hysteresis of testing system,testing irregularities,and so on.