Suspension type dust removal device and gate type plasma cutting machine

The utility model relates to the field of gate type plasma cutting machines, in particular to a suspension type dust removal device and a gate type plasma cutting machine, the suspension type dust removal device comprises a plasma cutting machine body and further comprises a suspension type dust removal device, and the suspension type dust removal device comprises a smoke dust collecting bin, a negative pressure air draft device and a smoke dust purifying bin. The dust removal device is hung below the cross beam of the gate-type plasma cutting machine and can longitudinally move along with the cross beam, and the smoke dust collection port is arranged right opposite to the cutting head and behind the cutting head, so that the dust removal device can move together with the cutting head, collect smoke dust generated by cutting and avoid diffusion of the smoke dust without influencing any operation performance of original equipment. The reducing air duct is arranged between the smoke dust collecting opening and