The present invention relates to a smooth breakwater installation structure of the seawater circulation, the base aggregate 10 is dredged to a predetermined thickness along the bottom of the seawater partitioning the harbor harbor and harbor; A base base portion 20 having a plurality of seating recesses 22 which are stepped on an upper portion of the base aggregate 10, and a landing protrusion 24a and a mounting recess 24b at the front and rear ends thereof; At the same time having a horizontal coupling structure parallel to the mounting recess 22 of the base base portion 20 and a vertical coupling structure stacked up to a certain height in the vertical direction, the outer side of the front and rear ends of the base base portion 20 The fitting recesses 32a and the fitting protrusions 32b are formed and seated to be fitted with the fitting protrusions 24a and the fitting recesses 24b, and a plurality of fittings are provided to mitigate the flow of seawater entering and exiting the space cross-sectional areas of the front and rear ends. Plate-shaped perforated plate 34 formed with holes of the fitting is fitted, the flow-relieving aggregate 38 of a certain particle size is filled to ease the entry and exit of seawater, and is fitted to the fitting protrusion 42 of the upper closing block 40 A box-shaped seawater circulation block 30 having a through hole 36 assembled thereon; It characterized in that it comprises a ;; the upper finishing block 40 is installed side by side disposed on the top of the sea water circulation block 30 of the top.;Seawater, breakwater, blue, seawater
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