The invention discloses a mangrove forest wet land protection device. The mangrove forest wet land protection device comprises a garbage salvage ship, a garbage salvage mechanism, a garbage lifting and conveying mechanism and a garbage recycling bin. The garbage salvage mechanism is arranged at a ship head of the garbage salvage ship; the garbage recycling bin is placed on a hull of the garbage salvage ship; and the garbage lifting and conveying mechanism is installed on the hull of the garbage salvage ship and is connected between the garbage salvage mechanism and the garbage recycling bin. According to the mangrove forest wet land protection device, by arranging the garbage salvage ship, the garbage salvage mechanism, the garbage lifting and conveying mechanism and the garbage recyclingbin, waste floating on the water surface of mangrove forests is salvaged, so that water bodies of the mangrove forests are prevented from being polluted, and positive cycle of a mangrove forest ecological system is facilitated.