Ecological film covering material for bottom mud pollutant control and preparation method of ecological film covering material

The invention belongs to the technical field of bottom mud pollution control, and particularly relates to an ecological film covering material for bottom mud pollutant control and a preparation method thereof. The ecological film covering material is composed of a bottom strength layer, a middle clamping layer and a surface layer inverted filter non-woven fabric. The bottom strength layer is made of coarse denier fiber non-woven fabric with a reverse filtering function, and the middle clamping layer is filled with ecological materials such as zeolite, calcite, modified gravel and modified ceramsite which are high in nitrogen and phosphorus absorptivity. When in use, the ecological film covering material covers the bottom mud of a water body in a central area and is fixed by an anchor piece or a pile, so that the stirring of stormy waves on the bottom mud can be reduced, the microorganism attachment surface can be increased, the concentration gradient of a mud-water interface can be reduced, and endogenous nit