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, 
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 
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 superior 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 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 
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 antirust time of the processed workpieces to be longer than 45 days.