To address the difficulties associated with fill investigations,such as complex composition,uneven distribution,and the challenge of identifying engineering geological characteristics,a series of methods are used including data collection,geological drilling,in-situ testing,hydrogeological observation,and laboratory testing,to obtain relevant data for the artificial fill,contour maps of fill spatial distribution and groundwater levels are generated using the principles of the rectangular grid algorithm.Through statistical and comprehensive analysis,the physical and mechanical indexes for the fill are derived,and the relevant geotechnical parameters are recommended,followed by an evaluation of special geotechnical characteristics and corresponding engineering recommendations.The results show that through scientific survey methods and analysis,we can reasonably deal with the difficulties of filling exploration,predict and deal with the complexity of artificial fill,and ensure the safety and quality of engineering construction.