The invention belongs to the technical field of biomass forming fuel equipment manufacture, and particularly relates to a dust removing device for biomass forming fuel. The dusting removing device comprises a hot blast pipe, a cyclone dust collector, an induced draft fan and a settling chamber, the cyclone dust collector comprises a first air outlet pipe, the induced draft fan comprises a second air inlet pipe and a second air outlet pipe, the hot blast pipe is connected with the cyclone dust collector, the first air outlet pipe is connected with the second air inlet pipe, the second air outlet pipe is connected with a third air outlet pipe, the end of the joint of the first air outlet pipe and the second air inlet pipe and the end of the joint of the second air outlet pipe and the settling chamber are each provided with a threaded connection mechanism which comprises a hollow fillister-head-screw-shaped threaded block and a threaded hole block which is provided with a threaded hole matched with the corresponding threaded block for use, the threaded blocks are fixedly connected to the outer walls of the ends of the corresponding joints, and the openings of the threaded holes are close to the ends of the corresponding joints; a hollow hose is arranged between two adjacent threaded connection mechanisms. The dust removing device for the biomass forming fuel has the advantages that the buffering effect of the hollow hose plays buffer action on the dust removing device, and the threaded connection mechanisms facilitate installation of the hollow hose.