PURPOSE: A laminate type coastal erosion prevention block is provided to prevent a lower erosion prevention block from moving or crumbling and coastal erosion because the speed of seawater or waves is dampened. CONSTITUTION: A laminate type coastal erosion prevention block(10) comprises a lower block(20) and upper block(30). The lower block comprises a passage so that the internal space is penetrated. The lower block comprises a pair of fixing projections(21) in the upper part and lower damping inclined plates(22) on both sides thereof. The upper block comprises fixing grooves(31) in the lower part to be joined to the fixing projections and upper damping inclined planes(32) on both sides.
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