Oil-water separation device

The oil-water separation device comprises a supporting cylinder, the top end of the supporting cylinder is fixedly connected with an oil collecting hopper, the bottom end of the oil collecting hopper is communicated with a liquid guide pipe, the other end of the liquid guide pipe is communicated with a separation pool, the inner side of the bottom end of the separation pool is fixedly connected with a heating plate, and the top end of the oil collecting hopper is fixedly connected with a filtering cylinder. Supporting rods are fixedly connected to the two sides of the top end of the filtering cylinder, semi-filtering hoppers are rotationally connected to the top ends of the two supporting rods, before oil-water separation is conducted on the illegal cooking oil, food residues on the inner side of the illegal cooking oil can be filtered in advance through the semi-filtering hoppers, it is guaranteed that the food residues cannot be boiled out when the illegal cooking oil is heated, and the oil-water separation