The invention discloses an optimizing method for processing signal errors of different array antennas, and relates to the signal processing field of the antenna arrays, especially to an optimized design method for processing errors of the different arrays. According to measured amplitude array and array element phase error of reception signals of an array, an IA algorithm is used to determine an array factor model, an accurate change boundary of a power directional diagram is calculated, a convex optimization model of an array excitation amplitude is established, and a power directional diagram satisfying the performance requirement is obtained in an integrated way according to an obtained optimization excitation weight. Compared with an IA-PSO algorithm in a global random searching manner, the method of the invention can be used to obtain a better array excitation parameter under the same error, and the amplitude error of the array is kept relatively stable. Important parameters including the sidelobe level, the main lobe width and the array direction coefficient can be controlled effectively in antenna design.