[Objective] The characteristics of organic carbon, total nitrate, total phosphorus and its stoichiometry of the key species in primary succession stages of vegetaion were explored in the Hailuogou glacier forehead in Gongga Mountain, in order to provide better and exactly prediction of the vegetation succession under the background of the globing warming.[Methods] Combined with field investigation and indoor experimental analysis, the organic carbon, total nitrogen and total phosphorus of the roots, stems, leaves, seeds of Epilobium hirsutum and Astragalus mahoschanicus were analyzed.[Results] The range of organic carbon of the Epilobium hirsutum root changed between 436-445 g/kg, which was higher than that of the Astragalus mahoschanicus root (416-423 g/kg). The concentrations of the organic carbon of different organs of Epilobium hirsutum were as follows:in roots > in seeds > in leaves > in stems, the concentrations of the total nitrogen were:in leaves > in roots > in seeds > in stems, and the concentrations of the total phosphorus were:in seeds > in leaves > in roots > in stems. While the concentrations of the organic carbon of different organs of Astragalus mahoschanicus were:in roots > in seeds > in stems > in leaves, the concentrations of the total nitrogen were:in leaves > in roots > in seeds > in stems, and the concentrations of the total phosphorus were:in leaves > in seeds > in roots > in stems. The ration of organic carbon to total nitrogen of different organs of Epilobium hirsutum was higher than that of Astragalus mahoschanicus. The ratio of total nitrogen and total phosphorus changed between 5.94 and 17.82.[Conclusion] The high ratio of N/P and low C/P of Astragalus mahoschanicus, which reflects the higher growth ratio and propagation rates. It also indicates that the Astragalus mahoschanicus has stronger growth competition strategy than that of the Epilobium hirsutum and better compelling the succession process.