Based on the segmentation characteristics in space frequency of wavefront distortion, a new method of constructing wavefront distortion is proposed to study the relationship between wavefront distortion and coherent beam combination (CBC). Taking the structure and parameters of SG- III technical integration line as a model and using Monte-Carlo method to realize the simulation, the effects of low and midhigh frequency wavefront distortions are analyzed. Moreover, the corresponding relationships between the low, mid- high frequency wavefront distortion and the result of CBC are established respectively. The results provide an analysis thought and a theoretical reference of wavefront distortion correction for CBC in highpower laser facilities.