The contents of five nutrient elements(K,Ca,Mg,Mn,Fe) in through-fall,stem-flow were measured in the Pinus koraiensis virgin forest of Xiaoxing'an Mountains,and according to the allotment of water amount,net input-quantity of each element in the forest was calculated,the results showed that:(1)The contents of nutrient elements in precipitation,through-fall,and stem-flow were all had the decreased order of stem-flow>through-fall>precipitation except of Fe.The average contents of different nutrient elements were in the decreased tendency of Ca>K>Mg>Mn>Fe.(2)The biggest coefficient of variation(Cv) in precipitation was 1.514 for K element and the least one was 0.827 for Ca element.The biggest Cv of nutrient elements in through-fall,stem-flow of the Pinus koraiensis virgin forest were Mn,Mg,and Fe,and the least were Ca,Mn.The average contents of the five nutrient elements' Cv in precipitation,through-fall,and stem-flow had the decreased tendency of precipitation > through-fall > stem-flow.(3)The net input-quantity of nutrient elements in the Pinus koraiensis virgin forest was as follows:K>Ca>Mg>Mn>Fe,furthermore,the net input-quantity of Fe in Pinus koraiensis virgin forest was negative.