：Aiming at the problems of slow sand filling construction of steel cylinder cofferdam and high cost of purchased sand,this paper adopts blow filling technology of TSHD by the way in which multiple tubules disperse water flow filled steel cylinder cofferdam to form 4 steel cylinders in one day.The construction efficiency is 5 times higher than that of sand blowing ship,and the cost is only a quarter of that of sand blowing ship,which has good technical and economic value.At the same time,the construction process of loading barge is carried out by TSHD,which guarantees the supply of bagged sand and solves the problem of insufficient sand source and high cost of outsourcing.The application of blow filling technology at steel cylinder and barge loading of TSHD in M project can guarantee project progress and save cost,and provide reference for the multi-functional application of blow filling technology of TSHD.