Based on the grey correlation analysis method with supporting data of Shanxi Province from 2011 to 2020, an analysis has been made of the influencing factors of tourism economic development in Shanxi Province, with 8 primary and 20 secondary indicators elected, including economic support factor, tourism transportation factor, residents’ living standards factor, environmental quality factor, tourism service factor, human resources factor, information resources factor, and tourist attraction factor. The results show that the correlation between each primary indicator and tourism income in Shanxi Province is ranked in the following desending order: tourist attraction factor , residents’ living standards factor, information resources factor, economic support factor, human resources factor , environmental quality factor, tourism service factor, tourism transportation factor. The correlation degree of each secondary indicator is greater than 0.6, mainly distributed between 0.7 and 0.8; the number of domestic tourists, the added value of the tertiary industry, and internet broadband access users are highly correlatied with tourism revenue, while the correlation between passenger volume and the number of inbound overnight tourists is relatively small. Finally, corresponding strategic suggestions are proposed to ensure a healthy and steady development of the tourism economy in Shanxi Province.