The invention discloses a gasoline refueling pollutant control device and a fuel oil supplying system. The gasoline refueling pollutant control device comprises an impeller, a breather pipe and a baffle; the impeller is rotatably arranged in an oil filling pipe on a fuel tank; the breather pipe comprises a first ventilation end and a second ventilation end, the first ventilation end is communicated with the fuel tank, the second ventilation end is communicated with the oil filling pipe and is capable of making air passing through the second ventilation end blow to rotate the impeller, and the air is capable of flowing towards the position below the impeller along with the rotation of the impeller; the baffle is fixedly arranged on the position, far away from the second ventilation end, on the inner wall of the oil filling pipe, is fixedly arranged above the impeller, and is a certain distance away from the side, close to the second ventilation end, of the oil filing pipe. According to the gasoline refueling pollutant control device and the fuel oil supplying system, the circulation of oil gas inside the fuel oil supplying system is achieved, the oil gas is prevented from flowing into the atmosphere from the port of the oil filling pipe, and the pollution caused thereby is avoided.