The present invention relates to an ecological block for protecting a riverbed ecosystem, to provide a habitat for aquatic life in the bottom of the river, to solve the problem that the river ecosystem is destroyed by the concrete retaining wall.;Ecological block for protecting the riverbed ecosystem according to the present invention for performing the above object, the base bottom support frame 100 is formed with a fastener 110 on the upper surface; A first fastener 205 corresponding to the fastener of the base bottom support frame is formed at the bottom thereof, is installed in association with two or more of the base bottom support frame, and a hole 260 is formed to allow the aquatic organisms to inhabit. An associating block 200 having a second fastener 230 formed thereon; A fastener 310 corresponding to the second fastener of the assoblock is provided on the bottom, and is composed of an upper plate cover 300 which is installed in association with two or more of the assoblocks.;The ecological block for protecting the riverbed ecosystem configured as described above minimizes the destruction of the ecosystem by providing a habitat for underwater life in the concrete stream, and complements the tight cohesion between blocks, which is a disadvantage of the concrete block, to provide a solid structure. It is effective to provide.
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