A multifunctional medical drainage tube' is a usual product used for leading out foul solution and objects in operating fields after clinical medicine surgical operations. The utility model is characterized in that a tube core, a metal pipe sleeve and a silicone tube in a drainage pipe sleeve are interchangeably used according to needs, which overcomes the deficits of using each existing ' drainage tube '. The utility model has the advantages of simple and convenient operation and high effectiveness, and the direction and the position of the tail end of the drainage tube is changed according to the needs in order to achieve the goal that the utility model is favorable for flushing, pumping liquors, injecting drugs and thorough drainage. The product can ease the workload of medical staffs and the pain of patients, and also has the performance of reuse, which reduces consumption.