This paper reported the decomposition and nutrient content of fallen woods in the moss-Pinus koraiensis dark-conifer forest at North Slope of Changbai Mountain. Result shows that monomial exponential attenuation model can be used to simulate decay process of fallen woods. The decomposition constant of Abies fallen wood is 0.0168/a(r 2=0.9483),while fallen wood of Picea is 0.0150/a(r 2=0.8895). The nutrient content was mensurated with average content of C at 18876.90kg·hm -2, N at 299.00kg·hm -2, P a...