In the south breakwater project of Dongying Port Area of Dongying Port,in order to solve the problems of the traditional base protection technology,such as large amount of on-site binding and splicing works,high splicing quality requirements,complex technology,difficult construction,low efficiency and poor integrity,a new type full length and high strength geogrid composite soft mattress was developed.The integrated production technology that the bottom layer was full length geotextile,the middle layer of row was high strength geogrid,the middle layer of the remaining row on both sides was impact resistant and anti-aging cushion protection layer,and the surface layer was full length geogrid was developed,which solved the production problem of complex structure soft platoon.A traction device of power pulley group suitable for the construction of full-length and high strength soft mattress was developed,which solved the problems of heavy soft mattress,high friction resistance and difficult in sinking.The quality detection method of side-sweep sonar was adopted to improve the efficiency and quality of mattress construction.