The invention discloses a device for removing hemp threads in a dust removal pipeline. The device comprises a grating door panel (4), a hemp thread removing channel and a jetting removing mechanism, wherein the bottom end of the grating door panel is connected onto the inner wall of a dust remover pipeline through a grating door rotating handle (12) in a hinging manner; a telescopic pushing mechanism I arranged on the inner wall of the dust remover pipeline is arranged in front of the grating door panel; when the hemp thread removing channel corresponding to the grating door panel is in a horizontal state, the position below the grating door panel is fixedly arranged on the dust remover pipeline; a hemp thread storage tank (11) and a hemp thread removing opening (10) are formed in the bottom of the hemp thread removing channel; the hemp thread removing channel also comprises a plug board (9) and a telescopic pushing mechanism II (7); and the jetting removing mechanism comprises an air compressing pipe (5) and an air compressing spray head (6). According to the device for removing the hemp threads in the dust removal pipeline, the hemp threads or other silk fibers together with dust entering in the dust removal pipeline can be conveniently removed online, thereby guaranteeing the service efficiency of a dust remover and reducing the maintenance cost of the dust remover.