Water tank type dust arrester

The utility model discloses a water tank type dust arrester which comprises a dust arresting water tank and a working frame. The dust arresting water tank comprises a bottom plate (4) and a plurality of side plates (1). A frame is defined after the side plates are sequentially connected and is fixedly installed on the bottom plate (4). A plurality of pedals (2) are longitudinally arranged at the upper portion of the frame defined by the side plates. The working frame comprises supporting legs (6) and a support (7), wherein the supporting legs are installed at the lower portion of the support. The dust arresting water tank is installed on the working frame. By means of the water tank type dust arrester, on one hand, smoke produced when a workpiece is cut can be directly blown into water through air flow and absorbed by water, almost no smoke exists, and then workers are prevented from damage caused by poisonous smoke; meanwhile, water exists at the lower portion, water in the dust arresting water tank can be c