Though measured stock,natural moisture rate,max water-holding rate,moisture absorbing speed and effective holding-capacity of different litter layers in six communities in Baihua mountainous areas of west Beijing from Jul.to Aug.in 2006.The results showed that,the highest stock was Pinus tabulaeformis's litter about 18.5 t/hm2,the lowest was litter of forbs about 3.9 t/hm2,stock of different litter layers,semi-decomposed litter was higher than un-decomposed litter,natural moisture rate of the different decomposed layers in same communities,semi-decomposed litter was higher than un-decomposed litter layers,the highest one Populus cathayana's difference was 97.1%;Semi-decomposed litter was higher than un-decomposed litter layers of water-holding capacity,it could indicate water-holding ability was relational to the decomposed degree;According to the moisture absorbing speed of litter,it could separate the process to three parts,included fast process(0~1.0 h),slow process(1.0~5.0 h),stagnant process(24.0 h);The experiments indicated that effective holding-capacity to rainfall of litter layers,in the declined order of Populus cathayana,Robinia pseudoacacia,Pinus tabulaeformis,Artemisia lavandulaefolia,Vitex negundo,forbs,linear correlation analysis revealed that effective holding-capacity to rainfall of litter layers and stock,max water-holding rate showed positive correlation,especially it with max water-holding rate had significant correlation(n=6,r=0.8396,P<0.002).