Hair clipper with adjustable knob limiting comb

The invention relates to the technical field of electric hair clippers, in particular to a hair clipper with an adjustable knob limiting comb, which comprises a hair clipper main body and the adjustable knob limiting comb, the adjustable knob limiting comb is sequentially provided with an upper cover, a limiting comb support and a lower cover from top to bottom, the limiting comb support is provided with an insertion groove, and the insertion groove is provided with an insertion hole. Comb teeth are arranged at the front end of the limiting comb support, a screw extending outwards is arranged in the inserting groove, and a rotary knob is arranged on the screw. The limiting comb support is provided with a clamping groove, and the adjustable knob limiting comb further comprises a metal elastic piece corresponding to the clamping groove. The length of the limiting comb can be adjusted, and the defect that according to an existing electric hair clipper, different clipping lengths are achieved by replacing a plura