Large vessel blocking air bag

The invention provides a large vessel blocking air bag, and belongs to the technical field of medical auxiliary instruments. A large vessel blocking air bag comprises an operating rod, a clamping auxiliary structure, an operating rod handheld part, an installation auxiliary structure, an annular sleeve and a rotation auxiliary structure. The operating rod is used for assisting medical staff in use and is connected with the clamping auxiliary structure. The mounting auxiliary structure is used for blocking blood vessels of a patient and is connected with the operating rod; and the clamping auxiliary structure is used for improving the use stability of medical staff and is connected with the operating rod. By arranging the clamping assembly and the fixing assembly, the second clamping columns of different specifications can be placed in the first groove through the fixing assembly, and medical staff can place different second clamping columns according to blood vessels of different thicknesses. The second clamp