Disposable automatic negative pressure drainage device

A disposable automatic drainage device, including infusion tube puncture, infusion tube, drainage tube, pipe, fluid bag, which is characterized in that the infusion tube puncture, infusion tube, drainage tube, pipe, fluid bag are connected in sequence to form a \d\ shape, the drainage tube with medical check hydraulic valve, the infusion tube is transparent drip kettle and flow control valve. The beneficial effect of the invention is a one-way valve to prevent medical drainage of liquid reflux to the lesion site drainage, can effectively prevent retrograde infection, drainage tube in the liquid due to gravity and siphon effect through the diversion pipe flow fluid bag, so as to form a negative pressure drainage tube automatic steady, continuous infusion tube for the fluid to maintain the drainage pipe to prevent liquid drained gas drainage pipe in the siphon effect disappeared, convenient pre hospital emergency treatment, battlefield first aid and wounded transport etc..