In order to study the influence of polymer aging effect on oil recover during the transportation, the dynamic aging experiments of polymer are designed herein, and the results indicate that the mixture aging process is very similar to static aging process as usual, so, the traditional static aging process can be used to simulate the mixture aging process. By data analysis, the viscosity estimation of polymer after mixing has been proposed. The maximum difference is under 1 mPa?s comparing with actual measurement. On the basis of that, the corresponding algorithm of numerical simulation has been given. The Calculation results indicate that, the aging effect of polymer solution has great influence on oil recovery. Therefore, the effect is needed to be considered in numerical simulation, and thermal stability is needed to be estimated in reservoir development