Abstract: By use of the eddy exchange coefficient K expressed by the quadratic function in Ekman layer which is close to observation. and under the condition of circle pressure field. the wind velocity in the planetary boundary layer(PBL) is obtained. Further, the distributions with height of field varibles of divergence. vorticity and vertical velocity are gained. In this paper, the first order derivation in the term of eddy discocity force in the motion equation and the lower boundary condition that the wind velocity at the mountain slope is not zero are counted. In the past. both of these are often neglected. The wind velocity, divergence. vorticity and vertical velocity are expressed by the simple elementary functions in this paper which is helpful for the parameterization and the deepening of dynamics cognation for the PBL.