Provided is an artificial ecological reef made of a composite concrete material for the ecological restoration of coral reefs. The artificial ecological reef comprises a concrete reef body, wherein iron fibers are at least distributed on a surface of the concrete reef body. According to the artificial ecological reef of the composite concrete material, a surface is provided with the uniformly distributed high-density and high-carbon cast iron fibers, wherein same are increased by 25% to 30% compared with that in a common concrete reef. The concrete reef has rich three-dimensional structures and may provide more spaces for coral larvae to adhere thereto, and this may improve the adhesion rate of the coral larvae. Moreover, since the carbon content of the high-carbon cast iron fibers is high, iron molecules and carbon molecules in high-iron fibers are likely to form the metal of a galvanic cell, such that an oxidation reaction takes place actively, and the resulting biochemical reaction can promote the calcification growth of hermatypic corals.
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