High-flash point mutual solvent used for acidifying oil field and preparation method thereof

The invention discloses a high-flash point mutual solvent used for acidifying an oil field and a preparation method thereof. The mutual solvent is composed of polyether polyol, a de-emulsifier and anactivity-aiding agent, the polyether polyol is subjected to polymerization synthesis of epoxypropane and propylene glycol. The problems of low flash point, flammable and explosive performance of the current mutual solvents can be solved, safety risk due to production, storage, transport and on-site usage of the mutual solvents can be solved, and tedious processes of export of dangerous materials can be solved. The mutual solvent has good stability, compatibility, intersolubility and demulsification performance, usage amount is less, the mutual solvent contains active hydrophilic groups such asa hydroxyl group and an ether group, a molecular weight is moderate, and when the flash point is greater than or equal to 65 DEG C, the mutual solvent belongs to a non-dangerous chemical; the preparation method is simple, the