Abstract:The organic carbon (OC) storage in alpine Kobresia meadow (AME) ecosystem on the Qinghai-Tibetan Plateau was studied using time and space stead method. As heavy human activity increasing, the degraded succession of vegetation community experience four stages such as: Gramineae grass+Kobresia humilis, Kobresia hummilis, Kobresia pygmaea and Herb-black soil. And the K. pygmaea stage is further divided into thickening, cracking, and denudating sub-phases. The results showed that:(1) Carbon storage in aboveground biomass drop from (134.7±7.1) gC m-2 in Gramineae grass+Kobresia humilis stage to (18.96±6.18) gC m-2 in Herb-black soil stage. (2) Carbon storage in both soil and belowground biomass appear a single peak curve change, the maximum were and the minimum were (49.7±0.83) g C/kg and (35967±179.8) gC m-2 in the K. pygmaea stage, and the minimum were (19.2±1.13) gC kg-1 and (121.6±61) gC m-2 in Herb-black soil stage, respectively. (3) Carbon storage in soil-plant system was gradually decreasing by change of carbon distribution ration in below ground /above ground with human activity increasing.Keep a condign depth of mattic epipedon about 4cm, it can take account of grazing and ecology function for alpine meadow on the Qinghai-Tibetan plateau.