Grease nipple mounting structure

The invention provides a grease nipple mounting structure. The grease nipple mounting structure comprises a grease nipple, a to-be-lubricated piece, a pressing block and an elastic snap ring, wherein a lubricating hole is formed in the to-be-lubricated piece; the elastic snap ring is arranged in the lubricating hole; the pressing block is matched with the lubricating hole and is abutted to the elastic snap ring; the grease nipple comprises a hollow grease nipple body; a first end of the grease nipple body is connected with a lubricating grease supply tube; a second end of the grease nipple body is connected with the lubricating hole; a through hole which allows the second end to penetrate through is formed in the pressing block; the through hole and the lubricating hole are coaxial; the second end has a conical structure; and an annular slot which is matched with the elastic snap ring is formed in the bottom of the conical structure. By the grease nipple mounting structure, the labor intensity of operators can be greatly reduced, mounting time is shortened effectively, and meanwhile, the service life of the grease nipple can further be prolonged.