Our air drawing model of polymers in the melt blowing process in verified by the experimental results obtained with our universiyty's cquipment. The predicted liber diamcters tally well with the experimental data. The effects of the processing parameters on the liber diameters are further investigated in this paper. We find that a lower polymer flow rate, a higher initial polymer temperature, a higher initial air velocity, and higher polymer melt flow index can all procuce finer fibers, while the effect of the initial air temperature is insignificant. The results reveal the great potential of this research for computer assisted design of the blowing technology.