Water-based antirust semisynthesis cutting fluid and preparation method therefor

Provided is a water-based antirust semisynthesis cutting fluid. The cutting fluid is prepared from the following raw materials, by weight, 1-2 parts of triethanolamine, 3-4 parts of boric acid ester, 12-14 parts of polyethylene glycol, 3-4 parts of stearic acid, 1-2 parts of 4-methyl salicylic acid, 1-2 parts of 2-aminoethyl heptadecenyl imidazoline, 1-2 parts of triethanolamine, 10-12 parts of white oil, 1-2 parts of sodium laurate, 6-8 parts of auxiliary agents and 200 parts of water. The cutting fluid has good lubricating effect, cooling effect and cleaning effect, has dispersion stability characteristics, has good extreme pressure wear resistance, has excellent anti-oxidation, anti-corrosion and antirust effects, can form a protection film on a metal surface, decreases corrosion and rusting of machine tools, workpieces and cutters, raises the finished product rate, and lowers production cost.