Near-water-surface cutting platform of numerical control plasma cutting machine

The invention relates to a near-water-surface cutting platform of a numerical control plasma cutting machine. The near-water-surface cutting platform of the numerical control plasma cutting machine comprises a water tank and a plurality of supporting columns, wherein the supporting columns are evenly arranged on the bottom face of the water tank; a detachable partition plate is arranged in the middle of the water tank, a step used for supporting the partition plate is arranged on the inner wall of the water tank, and a plurality of through holes for the supporting columns to conveniently pass are formed in the partition plate; the bottom faces of the supporting columns are provided with cooling grooves communicated with the interiors of the supporting columns, the water tank is provided with a plurality of connecting pieces for conveniently installing the supporting columns, one connecting piece corresponds to one supporting column, the connecting pieces and the supporting columns are fixedly connected through threads, and water passing holes used for being communicated with the cooling grooves in the supporting columns are formed in the connecting pieces. The near-water-surface cutting platform of the numerical control plasma cutting machine has the advantages that the near-water-surface cutting platform can be used for eliminating more than 90% of dust, and the using period of the cutting platform is prolonged by more than 3 times compared with the original using period. Certain water columns exist in the cooling grooves, and therefore heat dissipation of the supporting columns is facilitated.