The utility model discloses a wall junks fishing tool at an oil field, which comprises an upper joint and an outer barrel fixedly connected with the upper joint. An opening is arranged at the side wall of the outer barrel, and fishing teeth are arranged on the inner wall of the outer barrel. A rigid tube arranged in the outer barrel is fixedly connected to the upper joint. By using a structure that the rigid tube is additionally arranged in the outer barrel, the wall junks fishing tool can make positive circulation flushing to junks when in fishing. Because the inner diameter of the rigid tube for flushing is farther smaller than that of the outer barrel, the pressure of circulation liquid media flowing out of the mouth of the rigid tube is large, so the junks continuously swing under the function of the circulation liquid media, and the surfaces of the junks can be flushed cleanly and completely thereby improving the fishing successful rate. However, the utility model has the advantages of simple structure and convenient field disassembly, assembly and maintenance.