The invention relates to a water-based response type multifunctional metal machining liquid, the composition formula of which comprises a surfactant, a solvent, plant oleic acid, triethanolamine, sodiThe invention relates to a water-based response type multifunctional metal machining liquid, the composition formula of which comprises a surfactant, a solvent, plant oleic acid, triethanolamine, sodium salts with a corrosion inhibitive function, an inhibiter, dimeric dibasic acid, a defoamer, a preservative, deionized water, defoamer 903, preservative 1227, deionized water, and the like. The metaum salts with a corrosion inhibitive function, an inhibiter, dimeric dibasic acid, a defoamer, a preservative, deionized water, defoamer 903, preservative 1227, deionized water, and the like. The metal machining liquid is nontoxic, harmless and pollution-free, has no harm to human bodies or corrosion to metal surfaces, has no abnormal taste or deterioration after long time usage, and has superiorl machining liquid is nontoxic, harmless and pollution-free, has no harm to human bodies or corrosion to metal surfaces, has no abnormal taste or deterioration after long time usage, and has superiorauxiliary machining functions of cooling, lubricating, cleaning, extreme pressure, rust prevention, and the like. The metal machining liquid can be used for the metal working of devices for machining,auxiliary machining functions of cooling, lubricating, cleaning, extreme pressure, rust prevention, and the like. The metal machining liquid can be used for the metal working of devices for machining, milling, planning, drilling, boring, punching, wire-electrode cutting, and the like, and is especially suitable for high-grade numerical control machines. The machining liquid has high physical stabimilling, planning, drilling, boring, punching, wire-electrode cutting, and the like, and is especially suitable for high-grade numerical control machines. The machining liquid has high physical stability and small surface mightiness, and can effectively reduce the machining temperature, reduce the thermal deformation of workpieces and cutting tools, increase the abrasion resistance of the cuttinglity and small surface mightiness, and can effectively reduce the machining temperature, reduce the thermal deformation of workpieces and cutting tools, increase the abrasion resistance of the cutting tools, increase the machining precision and the surface finish quality of the workpieces to a great extent, effectively remove dirt on the surfaces of the workpieces, and prolong the natural antirusttools, increase the machining precision and the surface finish quality of the workpieces to a great extent, effectively remove dirt on the surfaces of the workpieces, and prolong the natural antirust time of the processed workpieces to be longer than 45 days.time of the processed workpieces to be longer than 45 days.