The earth and rock excavation of the plant area of the 3rd heavy water reactor project of Qinshan nuclear power plant was of two hill-bodies linked up with Qinshan hill and Huaxiang Co. undertook the works. In the light of the site geological conditions and the equipment, raw materials and apparatus situation, Huaxiang optimized the blasting parameters, improved the construction method and achieved complete success with the indexes of the completed pre-split surfaces better than the required standards.