Reducer end cover and reducer comprising reducer end cover

The utility model provides a reducer end cover and a reducer comprising the reducer end cover. The reducer end cover comprises a vent valve and an oil filler plug. The vent valve comprises a vent valve body and a vent valve cap, wherein the vent valve cap is movably clamped on the vent valve body, a fixed hole is formed in the vent valve body, and an air passage is arranged between the vent valve body and the vent valve cap. The oil filler plug is provided with an oil filler plug hole, wherein the vent valve body is in interference fit with the oil filler plug hole. The oil filler plug is arranged on the reducer end cover. The air passage, the fixed hole and the oil filler plug hole are communicated in sequence. An opening of the oil filler plug hole is upward. Due to the structure, the integration level of the reducer end cover is increased, and the space for installing a port on the reducer is saved; meanwhile, raw materials are saved, assembly working hours are reduced, and cost is lowered.