The utility model discloses an independent oil return device of injection molding equipment. The independent oil return device comprises an air cylinder, wherein the air cylinder is provided with a front cover mounting part, and an inner cavity is arranged at the front cover mounting part; an oil seal and a wearing ring are sequentially arranged in the inner cavity of the front cover mounting part from outside to inside; an independent oil return hole is formed in the side wall of the cover mounting part and penetrates through the side wall of the front cover mounting part to be communicated with the inner cavity of the front cover mounting part. The independent oil return hole is additionally formed so as to recycle oil leaked from a front cover of the air cylinder for prevent the oil leakage. The independent oil return device has the advantages simple structure, energy conservation and environmental protection and prevents the equipment and processing sites from being polluted. Moreover, the cleaning work and the maintenance work of the equipment are reduced, and the operation cost is reduced.