Resin sand mixer

The utility model relates to a resin sand mixer which comprises a sand mixing tank, a stirring device is arranged in the sand mixing tank, a detachable tank cover is arranged above the sand mixing tank, an annular baffle is arranged in the sand mixing tank, the annular baffle is fixedly connected with the inner wall of the sand mixing tank, a filtering device is arranged above the annular baffle, and the filtering device is fixedly connected with the inner wall of the sand mixing tank. A plurality of inserting shafts and inserting sleeves which are matched with each other are arranged between the annular baffle and the filtering device, the inserting sleeves are fixedly connected with the upper surface of the annular baffle, the inserting shafts are fixedly connected with the lower surface of the filtering device, and the inserting shafts are inserted from one ends of the inserting sleeves to the other ends of the inserting sleeves and are fixed in the inserting sleeves; and an air pipe and an air compressor