Thoracic cavity pressing device

The invention provides a chest pressing device. The chest pressing device comprises a supporting plate, a nut, a lead screw, a movable pressing head, a power source and a transmission mechanism. Wherein the nut is arranged above the supporting plate in a rotatable manner; the power source is arranged on the supporting plate and located on one side of the nut, and the power output end of the power source is connected with the power input end of the nut through the transmission mechanism. The screw rod penetrates through the nut and the supporting plate in a sliding mode in the axial direction of the nut, and the screw rod is connected with the nut through a screw pair; the movable pressing head is arranged at the bottom end of the lead screw. By adopting a mode of driving the nut in the screw pair and enabling the screw rod to do reciprocating rectilinear motion, the problems of low gravity center, complex design structure, unstable operation, large volume and weight, large rotational inertia and the like in t