The utility model discloses a retaining wall device with an inverted filter mechanism for a water conservancy project. The retaining wall comprises a retaining wall body, a wall stone protective layer, water seepage pipes and a foundation. wherein a wall stone protective layer is arranged at one end in the retaining wall body; a prefabricated concrete wallboard is arranged at one end of the wall stone protective layer; waterproof mortar is embedded into one end of the concrete; a cement block backing is arranged at one end of the waterproof mortar; a termite gnawing prevention layer is arranged between the cement block back lining and the waterproof mortar, steel bar frames are rammed and embedded in the two sides of the wall stone protection layer and the two sides of the cement block back lining, a water seepage pipe is arranged in the wall stone protection layer and penetrates through the wall stone protection layer and the cement block back lining, and inverted filter geotextile isinstalled on the inner surface of the water seepage pipe through waterproof glue. The retaining wall device with the inverted filter mechanism for the water conservancy project is powerful in function, scientific in design, convenient to operate, good in stability, high in reliability and suitable for wide popularization.