Engineering driller for jet grouting piles

The utility model discloses a jet grouting pile engineering driller which comprises a driller body and a connecting ring, a hydraulic supporting column is installed at the end of the driller body, a stand column is arranged on the upper surface of the driller body, and the interior of the stand column is rotationally connected with a lead screw through a bearing. A second motor is fixedly installed at the position, located on the upper surface of the stand column, of the end of the lead screw through a bolt, and a movable plate is arranged on the outer surface of the lead screw. By designing a scraper blade and a cleaning brush in a connecting ring, when the rotating rod moves upwards after drilling is finished, the scraper blade can be elastically and tightly pressed on the surface of the rotating rod through the deformation effect of a spring in a groove, muddy water on the surface of the rotating rod is scraped when the rotating rod moves, and meanwhile after the muddy water is scraped, the cleaning brush