The invention discloses a dedusting module and a cartridge type gas dedusting device. The cartridge type gas dedusting device comprises a cartridge with a gas inlet and a gas outlet; the dedusting module is arranged in the cartridge and comprises at least two layers of cover body and a plurality of dust-absorbing units arranged between adjacent cover bodies; the cover bodies are provided with vents; one of the gas inlet and the gas outlet is communicated with space beside the inner side of an innermost layer of cover body while the other o the gas inlet and the gas outlet is communicated with space beside the outer side of an outermost layer of cover body; and at least one cover body can rotate so as to allow static electricity to produce among the dust-absorbing units or between the dust-absorbing units and the cover bodies, so when gas from the gas inlet passes through the dedusting module, dust in the gas is adsorbed by the dust-absorbing units with static electricity. According to the invention, the phenomenon of gas ionization does not occur among the dust-absorbing units or between the dust-absorbing units and the cover bodies, so secondary pollution is not produced; an electrostatic field can be produced through rotation of the cover bodies and replacement of the dust-absorbing units is not needed, so purifying cost is low; and gaps exist among the dust-absorbing units, so small resistance is posed to gas flowing.