Ventilation and lubrication structure of gear box

The utility model relates to the technical field of gear boxes, and discloses a gear box ventilation and lubrication structure which comprises a box body, a fixing hole is formed in the top face of the box body, a ventilation pipe is fixedly arranged on the inner circle wall face of the fixing hole in a sleeved mode, and an exhaust pipe is fixedly installed at the top end of the ventilation pipe. The lubricating assembly is arranged on the outer circle wall face of the box body and used for improving the lubricating efficiency, the connecting bearing is arranged, and the outer ring of the connecting bearing can be connected to the inner circle wall face of the connecting hole in a sleeving mode, so that the position of the connecting bearing in the box body can be fixed; the surface of the ventilation pipe can be fixedly arranged on the inner circle wall face of the inner ring of the connecting bearing in a sleeving mode, the ventilation pipe and the planet carrier are fixed together, and therefore the positi