The paper analyzes the action mechanism of CFG pile+crushed-stone-pile composite foundation. Combining with engineering exam-ples,it introduces preliminary estimation methods,discusses construction technologies and control measures of combined composite foundation, and finally points out:the above-mentioned foundation treatment both improves the bearing capacity and eliminates liquefaction.%分析了CFG桩＋碎石桩组合型复合地基的作用机理，结合工程实例介绍了初步设计估算方法，论述了组合型复合地基的施工工艺和控制措施，指出这种地基处理方法提高了承载力，消除了液化作用。
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