The utility model relates to mechanical seal technical field, concretely relates to a double -lipped outer skeleton rubber oil seal, including the lip rubber spare of installation in the outside of axle, the outside fixed mounting of lip rubber spare is iron spare, the outside of lip rubber spare is coupled with spring ring, and the inside fixed mounting of lip rubber spare has dustproof lip and sealing lip, and the bottom of lip rubber spare is provided with main lip on one side of sealing lip, and the outside of lip rubber spare is connected with support structure between one side of iron spare. When the workpiece axle outside is sleeved into the lip rubber spare, the corner of the lip rubber spare is supported by using the support structure, and the dynamic sealing is carried out to the elastic characteristic of dustproof lip, sealing lip and main lip, has quite good sealing effect to the axle, and the spring ring outside the lip rubber spare provides certain restraint force and prolongs the oil seal life of oil seal lip part, after the workpiece axle is sleeved, the support structure and spring ring abut, limit spring ring movement, and further keep the support stability of oil seal spare.