Abstract: A soft pipe connecting device, comprising: a cylindrical joint, a fixed sleeve inside the joint for supporting the joint, and an outer ring sheathed outside the soft pipe and tightly pressing the soft pipe against the outer wall surface of the joint. The outside wall surface of the cylindrical joint is provided in sequence with a limit baffle, a groove and plurality of pawls whose tooth-tips are oriented towards the groove. The outer ring is made of expandable material. The inside wall surface of the outer ring is provided with a projection on the position corresponding to that of the groove of the joint, and plurality of reverse pawls whose positions correspond to those of the pawls of the joint. The groove may be provided therein with a sealing ring. The sealing effect is very good and can effectively prevent the leakage of gas or liquid.