The invention provides a constructing method for a fish shelter under the stress of high
silt concentration flood. The constructing method comprises the following steps that a suitable river reach is selected according to the
water area fish resource state, a flood plain tidal
wetland system is artificially constructed by adopting an
ecological engineering measure, and the flood plain
wetland hydrologic
connectivity is improved so that the stress of the high
silt concentration flood on fish can be avoided, specifically, A, the fish which needs protecting and the required
habitat condition of the target fish are determined; B, the site of a shelter is selected; and C, the shelter is constructed. According to the fish shelter constructing method under the stress of the high
silt concentration flood, a natural river bend on one side of a
river bed and a wide river channel of a
wetland can serve as construction areas under the condition that flood drainage is not affected; the continuity of the river channel is restored by excavating an overflow weir; the complexity and the hydrologic condition diversity of the river channel are improved; the shelter for sheltering the fish and other aquatic animals from the high silt concentration flood is provided; conservation of the species of the aquatic animals in a river is facilitated; and the contradiction between
river water silt regulation and
fish habitat protection can be effectively relieved.