This paper makes a field trial of deep vacuum rapping reinforcing of the dredger fill,mainly on the physical and mechanical characteristics such as value Ps of soil,moisture content,degree of compaction,plasticity index,the particle size distribution and bearing capacity,etc.The foundation’s bearing capacity and the degree of compaction of dredger fill meet the design requirements after treatment,which demonstrates the feasibility and practicality of this method and proves that this method will have broad application prospects in reclamation soft processing.