Disposable negative pressure drainage apparatus

The invention discloses a disposable negative pressure drainage apparatus, and belongs to the technical field of medical apparatuses. The disposable negative pressure drainage apparatus comprises a negative pressure drainage container body including a top wall, a bottom wall and a seal sleeve; a group of springs, distributed in the cavity of the negative pressure drainage container body; a drainage tube seat, fixed to one side, with the back towards the cavity, of the top wall; a drain port, fixed to one side, with the back towards the cavity, of the top wall. One end of the drainage tube is matched and connected with the drainage tube seat while the other end is connected to one end of a collecting tube, the other end of the collecting tube is matched and connected with a puncture knife; the disposable negative pressure drainage apparatus is characterized in that a liquid inlet valve seat is formed on the top wall corresponding to the position of the drainage tube seat, a backflow-resistant liquid inlet check valve is arranged corresponding to the position of the liquid inlet valve seat, the seal sleeve is a transparent seal sleeve, and the seal sleeve is provided with scale marks in the height direction. According to disposable negative pressure drainage apparatus, hydrops which is drained from the body of a patient and enters into the cavity is prevented from flowing backwards, and medical staffs can correctly master the drainage volume of the patient; the middle part of the group of springs is prevented from bulging, and the springs are reliably matched with the top and bottom walls; drainage effect is excellent, and drainage time can be shortened.