【英文摘要】Responses of soil temperature dynamics, freeze-thaw cycles, soil labile organic carbon fractions, and soil enzyme activities to snow and litterfall cover have been monitored and determined in subalpine forest soil in the western China during cold season through homogenized soil incubation in situ from 2008 to 2011. The results show that: (1) soil freezing period is shortened, and freeze-thaw cycles and freezing depth are also reduced for litter-covered soil, while they are not impacted significantly by snowcover. The minimum temperature of soil profile is often high than -5℃, and the most of freeze-thaw cycles are 24 hours or less. (2) Concentrations of soil labile organic carbon fractions (LFOC) are impacted significantly by snow, litter, and sampling time except easily oxidized organic carbon (EOC) and particulate organic carbon (POC), hence soil LFOC concentrations is more suitable as an early indicator for environmental change during the cold season. (3) Soil enzyme activities are sensitive to snow and litter cover except for soil invertase and cellulase to snowcover. Activities of polyphenol oxidase, invertase, and cellulose are one of suitable early indicators for subalpine soil biochemical responses to environmental changes. (4) Soil POC concentrations increase with the increase of length and number of freeze-thaw cycles, while LFOC decreases with the increase of length and number of freeze-thaw cycles. Microbial biomass carbon (MBC) decreases with the increase of number of freeze-thaw cycle. (5) Percentage of soil POC and LFOC increases along elevation gradients. The ratio of POC is 96.07% and LFOC is 87.62% of total organic carbon in soil of humus layer, which indicates that the dynamics of POC and LFOC influence the size and stability of soil carbon pool significantly in the subalpine soil.