The invention discloses an abdominal exercise machine for puerpera, which comprises slide rails and outriggers which are connected to each other. The rear end of the slide rail is provided with a rear foot, the bottom end of the outrigger is provided with a front foot, and the top end of the outrigger is provided with a crossbeam. There is a handle at the front end, and a forearm support mechanism on the beam, which can slide along the beam and rotate around the beam; there is a slider on the slide rail, and a knee limit mechanism on the slider, which can stabilize the knee. The limit knee is provided with a foot support mechanism at the rear end of the knee limit mechanism, and the distance between the foot support mechanism and the knee limit mechanism can be adjusted. In the present invention, the arm can be placed stably, eliminating the potential safety hazard of the forearm slipping; the angle of the forearm brace can be flexibly adjusted to suit the use of puerpera; the knee can be stably limited to eliminate the risk of the knee slipping during exercise; the foot It is placed in the foot support plate to support the foot stably; it can also adapt to different calf lengths, ensuring the safety and comfort of maternal exercise, and meeting the needs of women at this stage for postpartum body shape recovery.