The invention discloses a monitoring first-aid device for the pleural cavity in the cardiology department. The device comprises a bottom plate, two first vertical plates are arranged on the bottom plate, a second vertical plate is arranged at the end, opposite to each first vertical plate, of the bottom plate, a supporting plate is arranged at the end, opposite to each first vertical plate, of the bottom plate, a lead screw is arranged in each supporting plate, a first through hole is formed in the top end of each first cavity, a second cavity is formed in the end, close to each supporting plate, of the bottom plate, a motor is arranged on the side, away from the corresponding first vertical plate, of each supporting plate, the top ends of the lead screws extend out from the first cavities, baffles are arranged at the top ends of the lead screws, balls are arranged on the baffles, the lead screws are sleeved with nuts, connecting rods are arranged on the nuts, a supporting frame is arranged on the connecting rods, and a monitoring control cabinet is installed on the supporting frame. The device has the advantages of being capable of being applied and popularized in small and medium-sized medical institutions and some temporary medical assistance places, and solving the problem that medical resources are short.