The invention relates to an underwater foundation bed riprapping and leveling technology, and discloses a four-corner balanced ballasting and lifting method for a leveling ship. The method comprises the following steps of: S1, putting down pile legs on four corners of a ship body platform until reaching a mud surface, and injecting ballast water into a ballast tank on the ship body platform; S2, simultaneously putting the pile legs on the four corners of the ship body platform into mud, and continuously applying load to the pile legs until being stable; S3, lifting the ship body platform and ensuring that the bottom of the ship does not leave the water, and then stabilizing the pile legs; S4, lifting the ship body platform until the bottom of the ship leaves the water , and stabilizing the pile legs; S5, discharging the ballast water; S4, lifting the ship body platform to a construction height position. Distance for lifting the ship body platform to the draught position of the ship body platform in the step S3 may reach 1-2m. The four-corner balanced ballasting and lifting method for the leveling ship is high in work efficiency, and can ensure the stability and safety in the process of lifting the ship body platform and the paving accuracy of the foundation bed.