Abstract: Based on the ground treatment of Haikou Meilan International Airport Extension Project,the geotechnical characteristics of basalt residual soil which widely distributed in the airfield area are summarized,typical area is chosen as the ground treatment test section before large area ground treatment,the design and test plan are discussed by dynamic consolidation.Through the data analysis of tamping settlement monitoring,surface settlement monitoring,static penetration test,standard penetration test and heavy dynamic probe test,ground reaction modulus test,solid volume rate test,dry density test,laboratory soil test and post-construction settlement monitoring,reinforcement effect by dynamic consolidation are analyzed,the suggestions of partition ground treatment,backfill crushed-rock layer parameters,effective improvement depth,stop tamping standard and post-construction settlement monitoring are proposed,which provide a scientific basis for the design and construction of subsequent large area ground treatment.