A new type eco-friendly dredging equipment has been developed,which can increase slurry concentration and effectively curb slurry diffusion during excavation.Regarding the performance laws of excavation output and slurry diffusion under different key operation parameters,there is currently no applicable research method that can be used for quantitative evaluation.Systematic research on the equipment’s dredging characteristics has been carried out via physical modeling tests.Test conditions are designed using the multi-factor method,repeated tests are carried out to ensure the reliability of the data,and comparative tests without the eco-cover are also conducted to verify the eco-friendliness.The flow rate and slurry concentration are measured to determine the excavation output,and the turbidimeter is used to assess slurry diffusion situation.After comprehensive statistical analysis of the data,it is found that compared with conventional cutter operations,the dredging equipment raises slurry concentration by more than 136% and prevents over 90% of slurry diffusion.Engineering trial excavation tests also show that it has excellent high-concentration excavation performance and eco-friendly performance.