Abstract: The large-scale synoptic conditions and the physical properties on the 850mb level and the surface are used as the external parameters.We treat particularly the lower part of the boundary layer in which the effects of the stratification are considered.The higher part,in which it is assumed that the geostrophic winds vary linearly with height,is divided into 15 equal intervals of length.Matching the wind fields of the two parts we set up a steady-balance initial value model.Taking the results obtained above as the guess fields and utilizing the observed wind data on the 1500,900,600,300m levels and the ground,we proceed in dynamic adjustment and try to constitute the initial values of the boundary layer to approximate the actural atmospheric state.In this paper,the effects of some physical parameters in the atmospheric boundary layer are analysed by use of the model constituted above and the choice for the vertical division is discussed.We also describe the adjustment process through integrating numerically boundary layer motion equations.Finally,vertical motion and horizontal wind fields in the boundary layer for the Northern China at pp 002,23 August 1966 are presented as an example.It is evident that these results describe detailed structure of the atmosspheric boundary layer.