High-pressure jet grouting drill bit

The utility model provides a high-pressure jet grouting drill bit which comprises a drill bit body and a sharp edge at the bottom of the drill bit body, the drill bit body is composed of a plurality of sections of drill rods, and every two adjacent sections of drill rods are connected in a screwed mode. A water conveying cavity is formed in each section of drill rod, and the water conveying cavities in the adjacent drill rods are communicated to form a Venturi type structure; the drill rod located at the lowermost end is provided with a first spray hole extending upwards, and the sharp blade is provided with a second spray hole extending downwards. The jet grouting drill bit has the advantages that the impact force of fluid is strong, the permeation and diffusion effects are good, and a jet grouting pile has a better anti-pulling anchoring effect; the jet grouting area is large, reinforcing of drill holes is completed in different directions by means of rotating force and is not limited to the vertical direct