Abstract: Whether the Pinus koraiensis plantation can keep the in-organic activity balance and its steady growth, except the weather condition, depends mainly on the amount of litters' nutrient elements turned back into the soil every year. The purpose of this paper is to find out various laws of the litter change, and in order to improve the plantation condition as well as establish the best structure of typical stand we provide scientific basis here so that the maximum increasing of production per unit area may be appear. This experimental material is from the result of periodical observation during 1980——1984 in the Pinus koraiensis plantation of 26 years old, which is within the Laoshan experimental plantation station in Maoershan of Shangzhi County in Heilongjiang province. The litter's of Pinus koraiensis come from needle leaves,needle leave branches, needle leave bark, flowers, fruits, bud scales, birds' excrement, etc. ……. The average dry weight of five years is 1701.6kg/ha.; The amount of nutrient elements of various litters are evidently different. The contents in leaves is the highest and the least in leaf sheathes; The average amount of nutrient elements (N, P, K, Ca, Mg, Cu, Fe, Mn)turned back into the plantation floor is 32.78kg/ha.