Air-permeable waterproof cover of water pump bearing box

The utility model discloses an air-permeable waterproof cover of a water pump bearing box, which comprises a cover body and a cover cap arranged above the cover body, wherein a through hole extending to the position below the cover cap is arranged in the cover body, and a vent hole communicated with the through hole is arranged in the surface position below the cover cap. The cover cap is arranged above the vent hole and can effectively stop the splashed water from entering the vent hole, so as to ensure that the splashed water is not likely to enter the bearing box and ensure that the lubrication effect in the bearing box is normal. When the vent hole is further inclined, from top to bottom, along the surface position of the cover body, even though the slashed water enters the vent hole, the slashed water can automatically flow out from the vent hole, so that a better waterproof effect is achieved.