The invention relates to a rotary dust remover and a filtration and dust removal method thereof. The rotary dust remover comprises a box body, dust removal and filtration components and parts and a drive device. The box body is provided with a filtration chamber and a dust removal chamber, the filtration chamber is provided with a dust-containing air inlet and a purified air outlet, and the dust removal chamber is provided with a blowback air inlet and a dust outlet. The dust removal and filtration components and parts embedded into the filtration chamber and the dust removal chamber. The dust-containing air inlet and the purified air outlet are located in the upper side and the lower side of the dust removal and filtration components and parts respectively, and the blowback air inlet and the dust outlet are located on the upper side and the lower side of the dust removal and filtration components and parts respectively. The drive device drives the dust removal and filtration components and parts to rotate around the axis of the box body. By adopting the rotary dust remover and the filtration and dust removal method, warm air can be processed, the high temperature of 500-900 DEG C can be resisted, the dust removal and filtration components and parts filter dust and perform blowback in a rotary mode, the filtered dust is not accumulated, blockage is not likely to occur, and the dust removal efficiency is high.