Grease filling device

The utility model relates to the technical field of grease filling, in particular to a grease filling device which is used for filling grease into a ball rack of a two-wheeled vehicle and comprises a base and a mandrel arranged on the base, a grease filling cup is sleeved on the outer side of the mandrel, and an accommodating cavity is formed by the inner wall of the grease filling cup and the outer wall of the mandrel to accommodate the ball rack. The grease injection cup is provided with the grease inlet and the grease outlet which are communicated with the containing cavity, when the grease is injected from the grease inlet to achieve grease injection of the ball frame, the grease can be smeared in the ball frame through the structural arrangement, and therefore the phenomenon that in the prior art, when the grease is smeared in a steel bowl, part of the grease is squeezed out by a frame is avoided; only a small amount of grease is left in the steel bowl, a large amount of grease is wasted, the grease is d