In order to find out the impact of the construction of photovoltaic power plants on vegetation and soil in alpine desert steppe, this study selected the Beixiang photovoltaic industry park of Tara Beach in Gonghe Basin as the research object, and conducted consecutive monitoring plots in August of 2013—2015. By choosing 3 typical plots of 10 m×10 m within fenced area, PV+fenced area and natural growth zone, and through using quadrats, this study surveyed vegetation structure characteristics and analyzed soil properties in laboratory. Finally, different indicators that evaluated the effects of photovoltaic plant were combined. The results showed that: Fenced and photovoltaic plants had a significant impacts on the vegetation and soils. Compared with the data surveyed in 2013, the photovoltaic fenced area data of plant species numbers, vegetation coverage, aboveground biomass, richness index, soils water content, organic matter content and nitrogen content respectively increased by 116.7%, 83.9%, 68.7%, 119.2%, 88.6%, 83% and 81.8% in 2015, which showed significant change tendency (P＜0.05). Voltaic panels improved environmental factors of plant growth in alpine desert steppe, especially increased soil water content, which can protect fragile ecosystems and showed sand-fixing effect, promoting the succession development of desert grassland.