Crane pile lifting system under condition of barging piles at sea and construction method

The invention relates to a crane pile lifting system under the condition of barging piles at sea. The system comprises a crane, a shifting device mounted on a deck for moving a steel pipe pile to be lifted to a pile lifting position, a rail paved in the pile lifting position, a pile delivery trolley arranged on the rail, a traction device connected to the pile delivery trolley, and a sleeper arranged below the rail. According to the crane pile lifting system disclosed by the invention which is assisted by adoption of such devices as the pile delivery trolley under the condition of barging the piles at the sea, as the rail and the pile delivery trolley are arranged, the tail end of the pileisput on the trolleyduring lifting, the trolleymoves on the rail in the lifting process, the tail end of the piledoes not directly rub the deck, and the pressure of the steel pipe pile on the deck acts on the rail to increase the stressed area so as to cause collapse of the deck; and in the lifting process, the condition of transverse displacement of the pile is prevented due to limit by the rail.