This paper, on the basis of the comparing the three-dimensional bogus wind and wind-pressure relation of the NCAR-AFWA scheme, adopts the asymmetric horizontal wind scheme in terms of the moving speed, direction and friction and other objective factors, and selects the vertical wind profile scheme in terms of the upper anticyclone structure, and then forms the model initial field by dynamic nudging technology. Finally, the results of the typhoon Rananim simulation have shown that, by introducing objective factors and observing facts into constructing bogus model,the initial field, in which the assimilation technology makes physical fields more harmonic, can be closer to the observing, and then can lead to better results of the track, intension and the rain distribution.