The present invention relates to a porous wave dissipation concrete block and fishing banks using chilled steelmaking slag by watering, and to a manufacturing method thereof. More specifically, the present invention relates to a wave dissipation block installed in harbors or coastal facilities to eliminate wave power, and to artificial fishing banks to raise fishes in the sea. The wave dissipation capacity of the wave dissipation block is improved and location secession thereof is prevented with a porosity of 10-25% and a 28-day strength of 27.4 MPa or greater using chilled steelmaking slag by watering with a grain size of 2.5-25 mm. The artificial fishing banks are expected to contribute to increasing the number of caught fish via breeding of the fish by enhancing growth of microalgaes via elution of iron, and activating food in the marine ecosystem via breeding plankton. According to the present invention, concrete for the wave dissipation block and the artificial fishing banks comprises: 85.5-87.2 wt% of the chilled steelmaking slag by watering 10.6-12.0 wt% of slag cement and 2.2-2.5 wt% of water. Also, in accordance to the present invention, iron powder is included to maximize the eluted amount of iron component when the artificial fishing banks are made of the chilled steelmaking slag by watering. Moreover, 10 to 20 wt% of iron powder with respect to a total binding agent is included when concrete is manufactured in a shape of iron oxide with a size smaller than or equal to 0.3 mm. The formation of the porous structure of concrete can be inhibited if the size of the iron powder is greater than or equal to 0.3 mm, the addition effect of iron is reduced if an iron content is smaller than 10%, and the strength of the concrete of the artificial fishing banks deteriorates if the iron contents are greater than 20%.COPYRIGHT KIPO 2015본 발명은 습식급랭제강슬래그를 이용한 다공질 콘크리트 소파블록과 인공어초 및 이의 제조방법에 관한 것으로서, 더욱 상세하게는 항만이나 해안시설에 설치하여 파력을 소멸시키는 소파블록과 바다의 어류 양식을 위한 인공어초를, 습식급랭제강슬래그의 입
