Transformer bushing oil extraction device capable of preventing oil leakage and transformer bushing

The transformer bushing oil extraction device capable of preventing oil leakage comprises the oil extraction valve, and the mounting flange at one end of the oil extraction valve is tightly connected with the bushing oil extraction device seat through the fastening bolt, so that the reliability of connection between the oil extraction valve and the bushing oil extraction valve seat can be improved. An oil taking interface at the other end of the oil taking valve is used for taking oil, and a control handle capable of adjusting the outflow oil quantity of transformer oil is arranged between the two ends of the oil taking valve. When the transformer bushing needs to take oil, the control handle can be directly operated to take oil. When the transformer bushing needs to be provided with the monohydrogen gas on-line monitoring device, the monohydrogen gas on-line monitoring device can be directly connected to the oil taking interface. The oil extraction device is simple and convenient to operate, a monohydrogen g