The invention provides a material stirring cylinder for stirring the raw materials of a base tape of a cold-winding adhesive tape and relates to a material cylinder. A baffle (3) penetrates through an insert hole (11) and is clamped in two parallel slide ways (13), the other ends of a feeding pipe A (2), a feeding pipe B (9) and a feeding pipe C (10) respectively penetrate through an upper semi-sphere cylinder body (4) and are respectively in contact with the top surface of the baffle (3), a shrinking neck (6) is arranged at the lower end of a lower semi-sphere cylinder body (5), an electric motor (16) is arranged in a sleeve (8), and the other end of a rotating shaft (14) penetrates through a base plate of the shrinking neck (6) and is fixedly connected with a rotor of the electric motor (16). By arranging multiple feeding pipes with different diameters on the upper semi-sphere cylinder body, the unloading speed of the raw materials is controlled according to the different diameters of the feeding pipes, and the raw materials can be automatically unloaded according to a mix proportion, so that the disadvantage that an existing material stirring cylinder needs to be frequently watched by experienced workers during the material stirring is solved.