The invention provides a toxin expelling defecation device comprising a dredge rod; a hollow pipe is installed in the dredge rod; a front end of the dredge rod is provided with an air hole, a supercharging device, a pressure reducing valve and an expansion device. According to the toxin expelling defecation device of the invention, the dredge rod is provided with a hollow pipe which is stopped atthe air hole and is connected with the air hole; the air hole is connected with the expansion device at the front end; a screw(clamp) port at an end of the dredge rod is sealingly connected with a screw(clamp) port of the supercharging device; during usage, the dredge rod and the expansion device are together inserted in the rectum of a patient; a manual or mechanical supercharging device is operated so that the expansion device is expanded by air (hydraulic) pressure through the hollow pipe; the dredge rod is lightly pulled out so as to help faeces smoothly discharged through the intestinal tract; the expansion device is made of safe and flexible and elastic material which will not harm intestinal wall; the device is simple and convenient to clean; the device will not lead to bacterial breeding and plays a function of detoxification and skin nourishing, health care, treatment of constipation. The device is safe and clean.