By analyzing the historic data of Beijing, Tianjin and Hebei climatology stations, it was found that under stable weather conditions, the transport pathways of outside pollutants were divided into the southwest current, southeast current and east current, and the statistic data of the wind belts of the transport convergence (TC) showed that the TC of the southwest wind belt took 45 percent of all belts, the rate of the southeast wind belt was 36 percent, and that of the east wind belt 19 percent. The transport pathways (TPs) referred to the stable wind belts in the space and time scale, and the Euler wind field which appeared in secession in the territorial scales and local scales, being characterized by high frequency. On the intercity scales the current types could be divided into the TPs of the east wind, southwest wind and southeast wind, which were characterized by succession and continuance. On the dispose of the weather system, the current types could be divided into the TP system of the near east wind in the south wind of the territorial high pressure, the TP system of the southeast wind on the back of the high pressure on the sea, the TP system of the southwest wind in front of the inverse trough of the Great Bend of the Yellow River, and the TP system of the south wind in front of the low trough of the northeast, etc. All the three wind belt areas were right situated in the regions of three major emission sources of the plain of North China.