Abstract: In order to accelerate the replacement of BDS terminal and the large-scale application, and to deeply understand the data quality and relative positioning accuracy of BDS, in the complex observation environment of pumped storage power station, the advantages and disadvantages of data quality and calculation accuracy between BDS and other systems as well as between the five frequencies of BDS are analyzed, and the side length of total station is compared. The results show that:① The BDS outperforms other systems in terms of satellite spatial distribution, multipath resistance, and internal accuracy, with rms of baseline solutions that is lower than that of other systems.; ② Optimizing the BDS satellite and frequency selection can improve the accuracy of baseline calculation;③The internal compliance of the Beidou engineering control network is better than that of the multi-satellite combination system, and the external compliance is slightly weaker than that of the multi-satellite combination system. Based on the experimental research results, the single BDS can be applied to the surveying of high-accuracy construction control network of hydropower projects.