Abstract: Based on the geological hazard investigation of a dangerous section of transmission line tower，and combined with the literature，the parameters which evaluate the stability of dangerous section of the tower were determined. The safety mining depth was obtained by calculating the comprehensive effect of the thickness of coal seam mining. The probability integral method and empirical formula method were adopted to predict the location of the tower surface movement and deformation，the stability analyses and evaluations were conducted for a dangerous tower by statistical approach in accordance with relevant regulations，then the treatment measures were put forward. The methods suggested in this paper were proved to be good，and can provide references for similar projects.

Key words: denudational landform, transmission line, tower, stability evaluation