Multifunctional rotary jet grouting device for drilling

The utility model relates to the technical field of grouting drilling, in particular to a drilling multifunctional rotary jet grouting device which comprises a lifting support used for the rotary jet grouting device, and a drill bit assembly is movably installed at the upper end of the lifting support. The clamping assembly is fixedly installed on the front side of the lower end of the lifting support, and the clamping assembly is used for clamping and fixing the drill pipe at the lower end of the lifting support; and the cleaning assembly is fixedly installed on the lower side of the lifting support, and the cleaning assembly is used for brushing slurry on the surface when the drill pipe is taken out of the ground. When the drill pipe is pulled out of the ground, the drill pipe moves upwards from the through hole, the motor drives the gear ring and the annular brush to rotate, the annular brush rotates to wash the surface of the drill pipe in the through hole and clean the surface of the drill pipe contamina