Double-sleeve positioning and guiding device with lateral opening and closing functions

The utility model relates to the field of medical instruments, and discloses a double-sleeve positioning and guiding device with lateral opening and closing functions, which solves the problems that the drilling direction is easy to deviate and the stability is low in the prior art, and comprises a double sleeve consisting of an inner sleeve and an outer sleeve, the front part of the inner sleeve is a long tubular hollow cylinder with a lateral axial slot, the rear part of the inner sleeve is a polygonal cylinder with a lateral axial slot, the slot on the rear part is continuous with the front part of the inner sleeve, and a groove is formed in each of 12 o'clock and 6 o'clock on the surface of the front end of the rear part; the front portion of the outer sleeve and the front portion of the inner sleeve are the same in structure, the rear portion of the outer sleeve is a polygonal cylinder with lateral axial grooves, the grooves in the rear portion of the outer sleeve are continuous with the front portion of