A core muscle group training equipment includes a seat, a backrest located on the back side of the seat and a damping mechanism provided at the bottom side of the seat. When sitting on the seat and resting the back on the backrest, the user can selectively bend the upper body forwards and backwards to contract the proximal muscles, or keep the upper body immovable and move the lower body up and down to contract distal muscles. By means of biasing of the seat and the damping effect provided by the damping mechanism during operation, the muscle strength of the abdominal muscles is trained. When releasing the pressure, the damping mechanism returns the machine parts smoothly, preventing accidental injury.