Abstract: With view to investigating the convergence effect produced by airflow in punched apron compact spinning, a computational fluid dynamic model for punched apron compact spinning was developed with 3-D CFD technology. The applied software Fluent 6.3 was used to compute the flow field in convergence zone and the flowing state of airflow was characterized and distribution rules of static pressure and velocity in the convergence zone were analyzed. The results show that the converging effect of different axial velocity components for fiber bundles is different, the distribution rules of the static pressure and the velocity along the Z axes in convergence zone are similar, and the converging effect of airflow for fiber boundless is predominant. The distribution rules of static pressure and velocity in convergence zone under the ellipse hole are different from those under round hole, and also the ellipse hole has better converging effect than the round hole.