The utility model discloses oil sampling equipment for an on-load voltage regulation tap switch, which is used for extracting an oil sample in an oil chamber of the on-load voltage regulation tap switch. The oil sampling equipment comprises an oil pumping pipeline, an oil outlet pipeline, a first oil pumping pipeline and an oil pump, wherein one port of the oil pumping pipeline is connected with an oil draining hole valve of the on-load voltage regulation tap switch, one port of the oil outlet pipeline is connected with an oil filling hole valve of the on-load voltage regulation tap switch, and the oil pump is connected between the other port of the oil pumping pipeline and the other port of the oil outlet pipeline; one port of the first oil pumping pipeline is connected with the oil outlet pipeline, and the other port of the first oil pumping pipeline is connected with a first valve. After the oil draining hole valve and the oil filling hole valve are opened, insulating oil in the oil chamber is driven by the oil pump to flow into the oil pumping pipeline, flows into the oil outlet pipeline through the oil pump, finally returns to the oil chamber and is adequately mixed after repeated circulation, the first valve is opened, and then the oil sample is extracted. The oil sample extracted by virtue of the oil sampling equipment can reflect the overall quality of the insulating oil in the oil chamber after being adequately mixed in the oil chamber.