Underwater container step-by-step locking and releasing mechanism integrated equipment and using method thereof

The invention discloses underwater container step-by-step locking and releasing mechanism integrated equipment and a using method thereof.The underwater container step-by-step locking and releasing mechanism integrated equipment comprises a base, a mounting platform, a flow guide cover plate and a pressure-bearing container, the mounting platform is mounted on an underwater vehicle through the base, the flow guide cover plate is arranged on the mounting platform, an independent area for containing the pressure-bearing container is formed, and the pressure-bearing container is arranged in the independent area; the side, facing the underwater vehicle, of the installation platform is provided with an ejection mechanism used for pushing the pressure-bearing container and ejecting the pressure-bearing container out of the independent area. When the fastening belt is loosened, a second air pump is controlled, the power output end of the second air pump pushes a guide disc, and the guide disc slides in a sliding gro