Hand-free pipe high-pressure jet grouting device

The utility model discloses a hand-free pipe high-pressure rotary jet grouting device, which comprises a base, a rotary jet grouting device and a hand-free pipe, a jet grouting mechanism is arranged at one end of the drilling machine; a high-pressure slurry pump is arranged at the top of the jet grouting mechanism; auxiliary mechanisms are arranged on the two sides of the bottom of the rotary jet grouting mechanism, each auxiliary mechanism comprises a fixed steel bar, a plurality of fixed blocks, a plurality of movable steel bars, a plurality of rotating columns and a storage groove, the fixed steel bars are arranged in an inner cavity of the storage groove, the multiple fixed blocks are fixed to the outer wall of the rotary jet grouting mechanism, and the tops of the movable steel bars are rotationally connected with the middles of the rotating columns in a penetrating mode. Through the arrangement mode that the rotary jet grouting mechanism and the auxiliary mechanism are matched, and through lifting rotat