The construction of photovoltaic power station can destroy the surface soil and the vegetation and cause local wind and sand hazards, which needs to restore vegetation after the power station is built.The soil nutrients and their stoichiometry under different vegetation patterns were studied in different field(Pinus sylvestris var.mongolica, Medicago Sativa L.and Astragalus membranaceus var. mongholicus), which provided data support for the impact of the power station construction on the local natural environment.The results were as follows: The contents of soil nutrients were SOC>TN>TP.Among the same vegetation type, SOC content of Astragalus was significantly higher in the surface soil than in the subsoil.SOC content of Medicago Sativa L.field was significantly higher in the subsoil soil than in the surfacesoil.Among different vegetation types, only surface soil SOC of Astragalus was significantly higher than that of Medicago Sativa L.Subsoil SOC of Medicago Sativa L.was significantly higher than that of Astragalus.SOC, TN and TP in other vegetation field were no significant difference.The order of C N P stoichiometric ratio in the whole research area was C∶P>C∶N>N∶P.The C∶N and C∶P and N∶P of Astragalus field were higher than those of Pinus sylvestris and Medicago Sativa L.in the surfacesoil(0 ～ 20 cm), and there was no significant difference among them.C∶N and C∶P and N∶P of Medicago Sativa L.field was the largest in the subsoil(20 ～ 40 cm).Only the C∶N of surfacesoil of Astragalus was significantly higher than that of the subsoil.The contents of SOC, TN, TP, C∶N and N∶P were all weakly variable.C∶P was moderately variable.SOC was significantly positively correlated with C∶N and C∶P.The same as C∶N with C∶P and N∶P with TN.The C∶P of soil in the study area was 12.79, far lower than average C∶P of land soil in China, which indicated that the soil N of photovoltaic power station was the nutrient limiting factor.