The invention discloses a telescopic combing device which comprises a body. The body is internally provided with a combing device body. The combing device body comprises a row comb tooth part and a drive rod. The two ends of the row comb tooth part are provided with guide rods respectively. The combing device body is fixed to the body. The row comb tooth part and the drive rod are connected through connection rods. The drive rod is symmetrically provided with linear bearings. The bottom of the drive rod is provided with a plurality of limiting holes. The telescopic combing device is reasonable in structural design, the effect that the row comb tooth part can be adjusted in position in an up-down mode, the application range can be enlarged, and the production cost is reduced.