According to the present invention, provided is a multifunctional stepped artificial reef which comprises: a main body being a bilaterally-symmetric stepped ferroconcrete structure where a plane part which is horizontal with respect to the ground and a side part which is perpendicular to the plane part are alternately formed, and having a tunnel formed from a front inlet to a middle part and a rear inlet, a support part formed on the lower part of the inlet, and a penetrating hole formed on the side part and connected with the tunnel in the middle of the main body a mounting groove longitudinally formed on the plane part of the main body an adhering member inserted into the mounting groove and allowing seaweeds to easily be transplanted and adhere an upwelling hole formed on the uppermost plane part of the main body to vertically communicate with the tunnel, and allowing the light of the sun to reach the tunnel and promote photosynthesis of seaweeds while allowing sea currents to flow smoothly in the tunnel multiple inhabitation holes horizontally communicating with the tunnel on the side part of the main body and used for the habitat of an octopus a fastening piece insertion hole formed to be perpendicular to the ground on the lower side of the main body so that a fastening piece of a horizontal control plate can be inserted into the fastening piece insertion hole and the horizontal control plate having a fixed length of the fastening piece inserted into the fastening piece insertion hole and a bottom plate connected to the fastening piece at a fixed angle.COPYRIGHT KIPO 2016본 발명은 지면과 수평을 이루는 평면부와 이에 수직을 이루는 측면부가 교대로 형성된 좌우대칭의 계단형 철근 콘크리트 구조물로, 전면 출입구에서 중앙부와 후면출입구까지 터널이 형성되고, 출입구 하부에는 지지부가 형성되며 상기 측면부에는 중앙의 터널과 연결된 통공이 형성된 본체, 본체의 평면부에 길이방향으로 형성된 설치홈, 설치홈에 삽입되고 해조류 이식 및 착생을 용이하게 하는 착생부재, 본체의 최상위 평면부에는 상기 터널과 수직으로 연통되도록 형성되어 태양광이 터널까지 도달하여 해조류의 광합성작용을 촉진함과 동시에 상기 터널 내의 해류 소통을 원활하게 하도록 하는 용승공, 본체의 측면부에 터널과 수평으로 연통되어 문어의 서식처로 활용되는 다수의 서식공, 본체 하면에 수평조절판의 걸림쇠가 삽입될 수 있도록
