Double-cavity single J-shaped drainage tube

The utility model relates to a double-cavity single-J-shaped drainage tube which is characterized in that a drainage tube cavity and a guide wire tube cavity of the double-cavity single-J-shaped drainage tube are two independent tube cavities; an existing tail-section disc-shaped curled section of the drainage tube cavity is utilized, a flexible opening is formed in the front end of the guide wire tube cavity, the flexible opening is closed along with curl of the curled section and opened along with straightening of the curled section, and automatic opening and closing are achieved. An opening of a guide wire tube cavity of the drainage tube is located on the back side of the curled catheter, when the drainage tube is in a curled state, the guide wire tube cavity is driven to be stretched due to extrusion of an inner side compression face and stretching of an outer side stretching face of a curled section, and the extension amount of a far tube face is larger than that of a near tube face due to the fact that