Abstract: By the analysis of the dead leaves and branches and the holding water contents of five type standing forests—birch and larch mixed forest, larch planted forest, Chinese pine planted forest, birch natural forest and shrub forest in Wutai Mountain area, central Asia alpine region, the water conservation benefit among them was compared. The results showed that the contents of dead leaves and branches of five type standing forests was different, and their total weight varied from20 t/hm2 to 50t/hm2. The water holding ability among them was also different: The water yield of mixed forest was high, with the weight of 559t/hm2; the second one was Larch forest, with the weight of 359t/hm2; the last one was shrub forest, with the weight of 339t/hm2. The average content of water of five standing forest was 280 times than that of grass slope. The water conservation benefit of soil for different forests was 277.28%-173.67% higher than that of grass slope, among them, the highest one was birch and larch mixed forest, the followings were larch planted forest, Chinese pine planted forest, birch natural forest, and the lowest one was natural shrub forest. It is suggested that birch and larch mixed forest is a beneficial water conservation type in Wutai Mountain area.