In this paper,the effect of the nonstationary,nonuniform perturbation of the wind speed at the top of the two-dimensional stratified PBL on the inner parameters υ. /α and α angle are studied by the numerical method with the effects of the baroclinity process on the results examined. In is demonstrated that the contributions of baroclinity, stratification,nonstationary and nonuniform perturbation to the inner parameters are considerable. The results in the paper improve to a certain degree our knowledge of the parameter method in the PBL.