As a typical equipment of satellite navigation system in civil aviation, GBAS has higher performance level in integrity, availability and accuracy, and has special advantages in landing guidance and precision approach. In order to promote the technical application of GBAS in the domestic civil aviation field, based on the GBAS demonstration project of Chengdu Shuangliu airport, the site selection scheme and site analysis and evaluation of GBAS ground equipment in typical domestic airports is discussed in the paper