The blast method to squeeze mud and replacement with controlled loading had been applied to the design and construction of breakwaters at the first stage of the project of Yangjiang Nuclear Power Plant. The method ensured the expectable bottom width and depth of the breakwaters. The problem of formation of wide platform underwater was also solved. At the meantime

the amount of work to trim slopes was reduced. It was a successful application of blast methods of marine soft foundation processing in the design and construction of breakwaters.