Overflow drainage device

The invention discloses an overflow drainage device, and relates to the technical field of diamond wire cutting machines. The device comprises a machine body and a water tank is arranged on one side of the machine body, the bottom of the water tank is communicated with an overflow device through a water outlet pipe, the overflow device comprises a transition box communicated with the water tank, away from the water outlet pipe, of the transition box is communicated with an overflow pipe, a filter element is arranged in the transition box, the filter element is annular and divides the transition box into an inner layer and an outer layer, one side of the inner layer is communicated with the water outlet pipe, the bottom of the inner pipe is communicated with a drainage pipe, the outer layeris communicated with the overflow pipe, the overflow drainage device of the diamond wire slicing machine is beneficial to controlling the water amount required during slicing, the influence of the silicon powder concentratio