Long-acting general processing liquid

The invention discloses a long-acting general purpose processing liquid for flexible machining center and centralized cooling liquid supply system, which is prepared by charging emulsifying agent, antirust agent, extreme pressure agent, and bactericidal agent into base oil and water, and mixing by a finite proportion, wherein the mixture of zinc phosphate and paraffin chloride is used as extreme pressure agent, and the emulsifier is selected from sodium sulfonate of petrodeum, polyoxyethylene aliphatic alcohol ether and oleinic acid triethanolamine, the antirust agent is selected from boron esters and molybdates, and Sandan oil is used as the bactericidal agent.