Novel perfusion-flushing drainage tube and use method therefor

The invention discloses a novel perfusion-flushing drainage tube and a use method therefor and belongs to the technical field of drainage tubes. The novel perfusion-flushing drainage tube comprises a negative-pressure sucker, a liquid collecting bottle, a conduit communicating the negative-pressure sucker with the liquid collecting bottle, a drainage tube and a perfusion tube, wherein one end of the drainage tube communicates with the liquid collecting bottle, the other end of the drainage tube communicates with the perfusion tube through a connecting assembly, the bottom end of the liquid collecting bottle communicates with a drain pipe with a valve, and a clamping locating unit is arranged at one side of the liquid collecting bottle and is assembled to define a position of the liquid collecting bottle so as to prevent that the liquid collecting bottle drags the drainage tube due to gravity. Through arranging a support bar, a fastener, a leaf spring I and a leaf spring II, the drainage tube is supported and