[Objective]The distribution characteristics of preferential flow path in the two kinds of forest soil were studied in order to provide a theoretical reference for some reseaches such as efficient utilization of soil water and improving plant growth environment.[Methods] Dyeing tracer method was used and dyed soil profiles where there was preferential flow way occurred were photographed for further process and analysis.[Results] The patterns of water infiltration in the two kinds of forest soil were different. Width and amount of staining paths were heterogeneous in different depths of a profile and different profiles at the same depth. (1) The dying path's shape of soil under conifer-broadleaf forest looked like "inverted ladder"; (2) the shape under Phyllostachys pubescens land looked like a S-type. The width and the number of staining path in these two forests reduced gradually with the increase of soil depth.[Conclusion]It is concluded that preferential flow occurred in both of the forests, and its way unevenly decreased with the increase of soil depth. Plant roots at depth of 0-20 cm have a more remarkable influence on preferential flow germination as compared to the roots at other depths.