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以冀北山地4种不同类型白桦林为研究对象，分别选取代表性样地，对林地枯落物层和土壤层的持水性能进行分析研究。结果表明：1）枯落物总储量变化范围为10.98～17.76 t／hm2，针阔混交林高于阔叶林。枯落物的最大持水量与有效拦蓄量的变化规律一致，表现为白桦纯林＞落（少）桦混交林＞落（多）桦混交林＞杨桦混交林，不同林分类型间有效拦蓄量差异显著（p＜0.05）。2）0—40 cm深度内，随着土壤深度的增加，容重值增大，土壤孔隙度、最大持水量、有效持水量减小。土壤最大持水量与有效持水量均为混交林高于纯林。3）经综合评价，落（少）桦混交林的林地持水能力最高。“,”A study of water conservation capacity of litter and soil under different white brich forests was conducted by taking classical sample plots in mountainous area of northern Hebei province.The results showed that:(1)The total storage capacity of litter layers ranged from 10.98t/hm2 to 17.76 t/hm2,and total capacity of the mixed coniferous and broadleaved forest is higher than that of the broadleaf for-est.The maximum and effective water holding capacity of litter showed the same order:Betula platyphyl-la>mixed less Larix principis-rupprechtii and Betula platyphylla>mixed more Larixprincipis-rupprechtii and Betula platyphylla>mixed Populous davidiana and Betula platyphylla,the differences among them werehighly significant(p<0.05 ).(2 )With the deepening of the soil,soil bulk density was increased, but total porosity,maximum water holding capacity and effective water-holding capacity decreased within 0—40cm depth.The water holding capacity of mixed forests soil was higher than that of pure forests.(3)Through comprehensive evaluation,water conservation capacity of mixed less Larixprincipis-ruppre-chtii and Betula platyphylla was the strongest.