In order to solve the difficult water injection of J oilfield due to the high injection pressure，the activate water system， composed of 1×10³—2×10³ mg/L compounded surfactant S005 and 2×10⁴ mg/L clay stabilizer HY-01，was prepared，and the compatibilities with injection water，interfacial tension，anti-swelling property，salt resistance property，heat resistance property and thermal stability of the innovative system was measured. The results showed that the 2×10³ mg/L S005+2×10⁴ mg/L HY-01 activate water system had a great capacity of lowering interfacial tension to ultra-low magnitude（10^-3 mN/m）and the anti-swelling rate of the activate water system to the bentonite was higher than 90%. The activate water system had a certain effect of reducing injection pressure and increasing injection. The activate water system had good scouring resistance，salt resistance and thermal stability. After four times washed out，the anti-swelling rate kept over 85% and anti-swelling retention was higher than 95%. With the increase of NaCl concentration，the oil-water interfacial tension decreased in magnitude，and swelling rate kept stable. With increasing temperature from 55℃ to 82℃，the anti-swelling rate increased and the oil-water interfacial tension kept at ultra-low magnitude. In addition，after aged at the temperature of 82℃ for 30 days，the anti-swelling rate was higher than 90% and the interfacial tension kept at 10^-3 mN/m magnitude.