Combined artificial reef and coastalc erosion protection submerged breakwater block and construction method using the same

PURPOSE: A submerged block having an artificial fish bank function for preventing coastal erosion and a construction method using the same are provided to reduce waves by dispersing the direction of seawater flowing into the submerged block and reflecting the dispersed direction backward. CONSTITUTION: A submerged block having an artificial fish bank function for preventing coastal erosion comprises a box-shaped block body(12), lower front and rear block wings(14A,14B), an upper front block wing(14C), an upper hanging protrusion(16), a wedge coupling piece, and a block hanging protrusion(19). The lower front and rear block wings and the upper front block wing are located at the bottom and the corners of the front of the block body. The upper hanging protrusion is formed on one side of the top of the block body and has an upper wedge groove. The wedge coupling piece has a shape corresponding to the upper wedge groove.