Liquid redirector capable of reversing flow direction

The invention discloses a liquid redirector capable of reversing the flow direction. The liquid redirector is provided with a pipe body, wherein the front end of the pipe body is connected with a coronal body; the inner side surface and outer side surface of the coronal body are both a smooth curved surface; an exit at the front end of the pipe body is opposite to the inner side surface of the coronal body; and a channel for liquid to flow through exists between the front end of the pipe body and the two ends of the front end part thereof and the inner side surface of the coronal body. When the liquid redirector disclosed by the invention conveys liquid, after the liquid input into the pipe body flows out of the front end, the flow direction of the liquid is reversed through the obstruction and guide of the coronal body. In the functional treatment of heart-lung replacement realized by using an extracorporeal membrane lung device, after the liquid redirector is inserted into artery as an arterial duct, the flow direction of the blood ejected into the artery is consistent with the flow direction of the blood ejected from the ventriculus sinister, thus the limit of 'balance point' is broken without increasing or reducing the forward resistance against heart.