The paper introduces an engineer project in Mentougou of Beijing, the construction was difficult because of the thick pebble and crushed stone layer in the site, CFG pile was selected for foundation treatment. In view of the formation conditions, construction equipments, project construction period and cost of the project, CFG pile was designed with deformation control and according to the site conditions and the characteristics of CFG pile, construction process was formulated. For the problems may arise in the CFG pile construction, the corresponding quality control measures are put forward, such as embedment of steel protective pipe and selection of appropriate rotary drilling bit.