Refueling device for hydraulic station

The utility model provides an oil filling device for a hydraulic station, which comprises an air inlet pipe, an oil inlet pipe, an air filtering device and an oil filling device, and is characterized in that the air inlet pipe is arranged at a filling port on an oil tank and is used for communicating the air filtering device with the oil tank, external air is changed into dustless air through the air filtering device, and the oil filling device is used for filling oil. The dust-free air enters the oil tank through the air inlet pipe; the oil inlet pipe is installed on the side wall of the air inlet pipe, and hydraulic oil flows out of the oil filler and then enters the oil tank through the oil inlet pipe and the air inlet pipe. In the oil filling or oil returning process of the oil filling device, the filling port does not make direct contact with the outside, dust and other foreign matter cannot fall into the filling port, it can be guaranteed that oil in the oil tank is relatively clean, and equipment in a