Abstract: In order to understand the actual movement state，the process airflow in spunbond is studied by dint of computer software based on finite element analysis. The results substantiate that the rule of airflow in quench area differ from the idea of traditional chemical fiber process. There is no even horizontal wind in practice. Wind speed of upside less than lower consumedly. The effect of exhaust quantity on flow field is visible. The wind speed in draft path is very high，but keeps stable. The airflow in diffuse area is very subtle for structure dimension, adjusted state and process parameter. The main thing is to diffuse the high speed airflow and restrain the turbulence in diffuse area, especially on the net surface.