After analysing the data of 10 small drainage basin composition of periglacialregion of Dahinggan Ling Mountain, it showed that the R. E. Horton’s law of waterdrainage composition is accurate.The retationship between the mean stream length accumulation value and streamorder is better than the relationship between the mean stream length and stream order.The number of interbasin equals to the total number of streams in the basin,minus one. The relationship of the magnitude of interbasin area and streams orderform a positive geometric series.The drainage density, constant of channal maintenance area and the frequency-distribution of first order stream area on the eastcrn slopes of Dahinggan Ling moun-tain differ signifiantly from the western slopes, which is caused by climatic difference.Morphological features of dramage basins may be described by the mean basin area,relief ratio and stream length, they have a multiple corrclation with the streamgradient.