High salinity polymer-bearing reinjection water is used as injection water for chemical flooding in Xinjiang oilfield. The comprehensive performance of HPAM and hydrophobic associating polymer KYPAM prepared with polymer-containing reinjection water，including viscosity，rheology，viscoelasticity，long-term stability，inaccessible pore volume（IPV）and oil displacement performance，were evaluated. The results showed that KYPAM had better viscous，rheological and viscoelastic properties due to its special network structure. The anti-aging ability of KYPAM was better than that of HPAM. After aging for 90 days，the viscosity retention rate of KYPAM solution with the concentration of 1500 mg/L was 81.4%，while that of HPAM solution was only 40.2%. In the core permeability of 150×10-3 μm2，the IPV of 1500 mg/L KYPAM solution was 19.6%，while the IPV of HPAM solution was 22.1%. Compared with HPAM，KYPAM had a higher ability of starting relative pore-throat. In the core permeability of 150× 10-3 μm2，when 0.5 PV of polymer solution with the concentration of 1200—1500 mg/L was injected after water flooding，the oil displacement efficiency of KYPAM solution was 2%—3% higher than that of HPAM solution.