The invention relates to the technical field of medical apparatuses, in particular to a tool for gastroenterological clinical coloscopy. In an existing coloscopy lubricating mode, the outer wall of acatheter is smeared with a lubricant before the catheter is inserted. The tool for gastroenterological clinical coloscopy comprises a catheter, a handle with a cavity, and a camera shooting unit for camera shooting. The catheter comprises an inner core and an outer tube sleeving the inner core. The diameter of the outer tube is larger than the diameter of the inner core, and a gap is reserved between the outer tube and the inner core. A lubricating pipeline is arranged in the gap. The opening end of the lubricating pipeline is located at the end, connected with the camera shooting unit, of thecatheter. The inlet end of the lubricating pipeline is connected with a liquid storage cavity. The liquid storage cavity is located in the cavity in the handle. Lubricating is conducted when the catheter is inserted, the pains of a patient are relieved, and the tool has quite broad development prospects in the technical field of medical apparatuses.