The present invention relates to a method for constructing a plate type stone net unit with scour prevention and ecological protection functions, which can realize both a primary effect of preventing the stone net installed in a river or rapids from being damaged by being rolled due to localized heavy rain or tilting due to buckling and a secondary effect of providing a hiding place for fish and shellfish. To this end, the method for constructing a plate type stone net unit with scour prevention and ecological protection functions comprises: a stone net construction step in which a plurality of scour prevention stones are fixed to a net of a predetermined space so as to form an underwater structure in the river, and the stone net forming a structure is installed on the bottom of the river; a support part construction step of maintaining a fixed state by connecting a support part with the net between the scour prevention stones to prevent the stone net from being rolled up or tilted toward one side by water power; and a vegetation mat bar construction step in which vegetation mat bars are installed at regular intervals in a longitudinal direction on an upper portion of the support part to create a growing environment for the growth of aquatic plants in a space between the scour prevention stones.
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