The invention provides a novel peritoneal dialysis catheter which comprises an anti-blocking pipeline capable of being filled with a fluid inside and a fluid filling device used for filling the anti-blocking pipeline with fluid. One end of the anti-blocking pipeline is sealed and fixed to a dialysis section, the other end of the anti-blocking pipeline is communicated with the fluid filling deviceoutside the dialysis section, and the anti-blocking pipeline comprises an expansion bag positioned beside a dialysis hole and a flow pipe for communication with the expansion bag with the fluid filling device. The expansion bag is volumetrically inflatable when filled with the fluid. Compared with the prior art, the novel peritoneal dialysis catheter has the advantages of being ingenious in structure, good in anti-blocking effect, easy to insert in or extract out of a patient, good in operation safety and capable of achieving rapid postoperative recovery of the patient, can effectively solve the problem of deviation of the position of the dialysis catheter, can also well extract ascites in the abdominal cavity, and has more thorough dialysis effect.