The consolidation mechanism of crushed stone grouting pile was analyzed and the controlling criterion of quality of crushed stone grouting pile was raised.The available code for design of building foundation GB50007-2002 and the technical code for ground treatment of building JGJ79-2002 were referred.The revised formula of bearing capacity was introduced considering the traits of crushed stone grouting pile compound foundation.The measurement results gotten from practical project show that the formula is applicable for the calculation of the crushed stone grouting pile bearing capacity.