In order to use the dock for archaeological work in “Yangtze River Estuary II” ancient shipwreck salvage, the function of the old and disabled dock gate that has been abandoned for many years are restored. In order to resume service, the failure dock gate is tested, and the relevant removal, maintenance, and reinforcement of the dock gate are conducted based on the test results. After repair, the failed dock gate is lifted and opened successfully. After the ancient ship entered the shipyard, the gate closes smoothly, providing a good working environment for archaeological work. The recovery work of the failure dock gate is the first of its kind in the domestic shipbuilding industry. The full life cycle of special equipment such as dock gate is further understood.