The invention discloses an underwater blasting construction method. The method includes the steps: reasonably designing and setting hold size d, hole distance a, hole row distance b, blast hole inclined angle alpha, drilling depth H and over-drilling depth h; reasonably designing single underwater blasting explosive consumption, explosive charge in per hole and a blasting network by the aid of layering blasting design. Compared with the prior art, according to the method, parameters are reasonably and efficiently designed in the blasting design process, blasting construction is implemented according to blasting design parameters, and foundation construction can be accelerated by the method.