Low cost high efficiency dust removing desulfurizing device

The utility model relates to a dust removing and desulfurizing device with low cost and high efficiency. The utility model is provided with a flue gas passage (11) for leading flue gas into the top end of a casing of the dust removing and desulfurizing device with low cost and high efficiency, and the upper part in the casing is provided with a sprinkling chamber (2) composed of multiple rows of sprinkling pipes applying the counterflow of the flue gas to sprinkle and flush to carry out flue gas treatment; the middle part in the casing is provided with a water film generator (3) composed of a multi-layer stainless steel pipe of a differential treating zone; the lower part in the casing is provided with a flow baffle plate (5), and the flue gas is discharged to a chimney by a draught fan (9) through a flue; the bottom in the casing is provided with a water collecting tank (6) and a circulating water pool (8), and the upper part of the circulating water pool (8) is provided with a circulating water pump (7); an auxiliary desulfurizing agent adding device (1) is arranged above the sprinkling pipes. The utility model has the advantages of little space occupation, low running cost, high dust removing and desulfurizing efficiency, high transporting rate and little flow resistance.