The invention provides a dust collection device special for biomass burning equipment. The dust collection device comprises a flue gas box and a water tank, the flue gas box is vertically arranged atthe upper part of the water tank and comprises a gas inlet pipe, a flue gas box shell and a dust removal baffle, the gas inlet pipe is vertically arranged in the flue gas box, a hydrophobic membrane layer adheres to the inner wall of the gas inlet pipe, and the dust removal baffle is in a semi-arc shape, is arranged in a gap between the gas inlet pipe and the flue gas box shell and is downwards obliquely welded to the outer wall of the gas inlet pipe and the inner wall of the flue gas box shell. According to the dust collection device, flue gas of a biomass burner can be subjected to dust removal, the dust removal effect is good, and the self-cleaning function is achieved.