Abstract: This work measured the litter′s weight of every month in a year, the decomposing rate and the change of the major nutrient elements under subalpine dark coniferous forests in Wanglang nature preserve. The result shows:1) The total observed quantity of litter layers is between 29.97 and 91.76t/ha. 2)The litter weight changes slight for the different kinds of forests, with average about 2.8t/ha equally. The high withering seasons are May and October, which are the beganing and the end of the growth season. 3) In one year, the nutrients that returned to soil as litter are 35. 458kg, 5.71kg, 6.99kg, 62.89 kg and 6.78kg per hectare for N, P, K, Ca and Mg respectively. 4) The decomposing rate of litter is 0.3041g/g·year, t0.95 is 10 years. 5) In the time of litter decomposing, the releasing rates of nutrients are in the order of K>P>Mg>Ca>N.