The utility model relates to a hair comb with a blade. The utility model is characterized in that the comb is provided with a clamping piece with a row of teeth in an integral forming; besides, a movable clamping piece is also provided with a row of teeth which correspond to the comb teeth of the previous clamping piece, and the tooth lengths of two rows of teeth are slightly different, wherein, the end parts of the longer teeth are formed into tooth hooks bent toward the end parts of the shorter teeth, and the tooth hook is just butted with the end parts of the shorter teeth; two clamping pieces correspondingly are formed into inserting pieces and inserting slots, and the clamping pieces are combined together by correspondingly inserting and clamping the inserting pieces and the inserting slots; the inner sides of the clamping pieces are formed into placing slots; a blade is inserted and clamped in the placing slots between the clamping pieces, and the blades of the blade is exposed between two rows of teeth. The structure of the utility model can enhance the efficacy of the hair comb.