The present invention provides an adaptive chest compression device for cardiopulmonary resuscitation, which effectively solves the complicated operation of the prior art cardiopulmonary resuscitation equipment, the compression depth is not easy to control, the adaptability is limited, and the compression depth cannot be automatically adjusted according to different individuals, which affects the compression Efficiency and quality, the problem of delaying the rescue time; the technical solution is to include a flat plate, a horizontal plate on the lower side of the flat plate, a support rod on the lower end surface of the flat plate, a long gear on the lower side of the flat plate, and a rotating cylinder running through the flat plate. There is a rotating shaft in the cylinder, and a disc gear on the right side of the long gear; a pressure bar runs through the horizontal plate, a pressing block is fixed on the lower end of the pressing bar, a boss is on the upper end of the pressing bar, and a raised block is on the lower end of the disc gear. There is a cross bar above the right end, a cylinder is arranged at the left end of the cross bar, a vertical bar is arranged in the cylinder, a slant plate is arranged on the horizontal plate, sliding grooves are arranged on the slant plate, and wedge-shaped protrusions are arranged on the cross bar.