Diastasis recti abdominis (DRA) is one of postpartum complications, and abdominis muscles training is often used for the rehabilitation of DRA, but universally acceptable training modes and support of corresponding theories are not available now. In this paper, the mechanism of DRA and rehabilitation effects were reviewed from biomechanical view of the abdominal wall. Meanwhile, the main reasons for the controversy were also analyzed. The measurement method and measurement sites of inter-rectus distance (IRD) and rectus abdominis muscle thickness are inconsistent; the mechanism of DRA was not studied by biomechanical method. Therefore, in the future, the prediction for training effect of DRA should be standardized, the mechanical characteristics of abdominal muscles and their aponeurosis in the status of DRA should be studied, so as to provide references for abdominal muscle training