Functional temperature-resistant anti-salt profile control agent and preparation method thereof

The invention provides a functional temperature-resistant anti-salt profile control agent which comprises a functional acrylamide prepolymer, a cross-linking agent, a stabilizer, a performance regulator, a deoxidant and water. The functional acrylamide prepolymer is shown as a formula (I). The functional temperature-resistant anti-salt profile control agent disclosed by the invention is low in surface injection viscosity, controllable in gelatinization time, high in gelatinization strength and stable in performance, has excellent temperature-resistant anti-salt properties, has long effective stable period while acting on high-temperature (90-140 DEG C) or high-salt (40000-260000mg.L, Ca, Mg) oil deposit, can maintain excellent plugging strength for a long time, does not have anobvious dehydration sign, can obviously improve the oilfield development effect, and provides a reliable technical support for precipitation and oil increase of high water-cut oilfields in China. Thestructural formula is as