To counter the problems in the construction of underwater mold bag concrete revetment in the submerged breakwater of Huanghua Port including the tight construction period,great difficulties in the offshore operation and a lack of the technical standard,we adopt the field technical method to research the construction technology,construction difficulty and construction quality control of underwater mold bag concrete revetment.It is concluded that in full contact with the top block and accropode blocks after forming,the mold bag concrete (with no damage) can play a role of solid pressure on the top block.