When the cutter suction dredger dredges and transports cohesive soil,the dredging pipe will be clogged easily with the cohesive soil if we don’t control properly the filling speed and concentration.So,based on the summarization of the traditional anti-clogging method,we design a special anti-clogging mud pipe and relative method for preventing and dealing with the pipe’s clogging by the methods of experiment and comparison.