Air anion concentration analysis and evaluation results can provide a scienti c basis for the development of ecological health tourism. The 3-year monitoring data of air negative ions in 13 tourist attractions in 9 counties and districts of Lishui City were selected to analyze and evaluate the distribution characteristics and in uencing factors of air anion in Lishui City. The results show that (1) The annual average value of air anion concentration in the city is 2 550.4/cm3 , which is higher than the level of the air freshness index and is at an excellent standard, which is very bene cial to human health. (2) From the perspective of spatial distribution, the overall trend is to gradually increase from the central urban area to the outer suburbs, and the west is high, and the east is low, and the north is high, and the south is  at. The highest value is in Jinzifeng National Forest Park in Qingyuan County (3 677.2/cm3 ); the lowest cost is in Baiyun Mountain National Forest Park (1 161.4/cm3 ); the lowest four measurement points located in the central city. (3) The average value of the air anion concentration in each month exceeds the level of the air freshness index, which is hugely bene cial to health. In general, the  rst half of the year was higher than the second half, with the highest value in June (2 720.6 pieces/cm3 ) and the lowest value in November (2 430.6 pieces/cm3 ). (4) The air anion concentration value negatively correlated with temperature and positively correlated with moderate and sunshine hours. On this basis, some suggestions put forward to protect forest vegetation effectively and water resources, gradually improve the eco-environmental quality of the built-up area, and scienti cally use air anion resources to develop health tourism.