Infrared ray positioning auxiliary device for pile center of SMW construction method pile

The utility model discloses an infrared ray positioning auxiliary device for a pile center of an SMW construction method pile. The positioning device comprises a positioning frame, a positioning rope and an infrared transmitting device, the positioning frame is horizontally arranged, the inner end of the positioning frame is connected to a pile casing of the mixing pile machine, and the two corners of the outer end are each provided with one infrared transmitting device. The positioning rope is horizontally arranged above the site on one side outside the guide groove, colored adhesive tapes are adhered to the position, corresponding to the pile center, of the positioning rope at intervals to serve as framing marks of the pile position, the positioning rope is located under the outer end of the positioning frame, and meanwhile the two infrared emitting devices vertically correspond to the two adjacent framing marks on the positioning rope respectively. The device has the advantages of being easy to install, fr