Abstract: Baihetan hydropower plant is about to enter construction period,this paper analyzes the geological structure and weather climate background of hydropower plant dam area,as well as the meteorological support services in different construction period.The result shows that the hydropower station slippery collapsed geological structure determines its arduous task of meteorological support services in construction period.The meteorological support services strategy and implementation ideas are developed,and that lay the foundation for meteorological support services in construction period.