In practical engineering，different dredging soil quality and various soil quality that affect dredging efficiency will be encountered. The solution of dredging engineering-related problems cannot be separated from the study of the original rock and soil characteristics. The remolding of all kinds of dredging soil technology at home and abroad for rare precedent，hindered the research of dredging engineering issues. This article carries on the technology research of remodeling compacted clay and the properties analysis of compacted clay. Impact compaction method is adopted to improve the compaction，geting a method which can fit natural characteristics well. The results reveal that：through the improvement of soil，the impact compaction method can realize the clay remolding with different plasticity index，compactness degree and standard penetration strike number. The influence trend of soil moisture content and liquid index on compactness and penetration strike number is obtained，which can provide a reference for clay remolding technology.