Abstract: Now, WRF_RUC system is the numerical weather prediction business system in Southwest Regional Center.Firstly, there is a brief introduction about WRF_RUC system in this paper.Secondly, this paper analyzes the time-consuming situation of WRF_RUC system, and then puts forward the existing problems, and gives the reasons leading to these problems.Finally, this paper puts forward some solutions to optimize those much time-consuming process.Through the comparison, it is found that after optimization the system run time is shortened by more than half.The optimization effect is very obvious.