The invention discloses a multi-functional anorectal drainage tube, which comprises a tube body provided with a main drainage channel tube inside. The outer wall of the front end of the body is provided with a deelasticity-preventing balloon and a locking buckle in turn, and a hemostatic dressing layer is set on the outer wall of the anti-deelasticity-preventing balloon, and the hemostatic dressing layer is fixed on the tube body through the locking buckle, and the outer side wall of the front section of the tube body is provided with A plurality of elliptical drainage holes, a drainage bag is connected to the drainage outlet of the main drainage channel tube, and a sealed water injection valve is arranged at the water injection end of the balloon water injection channel tube. In the present invention, internal fixation and external fixation are formed by anti-loosening elastic balloons and locking buckles, which are not easy to come out, are not stained, can be left in place for a long time, and prevent the occurrence of tube detachment. The hemostatic dressing layer swells up with the expansion of the anti-deelasticity balloon, and the anorectal wound can be hemostasised with medicine and compression, so as to promote recovery and reduce pain.