Diving buoyancy vest with large-area MOLLE system

The utility model belongs to the technical field of diving buoyancy vests, and discloses a diving buoyancy vest with a large-area MOLLE system, which comprises a vest component. The vest assembly is provided with an air transmission assembly; the gas transmission assembly is used for inputting gas into the vest assembly or extracting gas in the vest assembly, so that the vest assembly is bulged or shrunk; a second connecting frame is fixedly connected to one side of the vest assembly, and a first connecting frame is fixedly connected to the portion, close to the lower portion of the second connecting frame, of the vest assembly; and two first springs are symmetrically and fixedly connected into the second connecting frame. The first connecting rod and the second connecting rod are pulled through the first spring and the second spring respectively, the first connecting rod and the second connecting rod drive the bottom frame and the limiting frame to move, the bottom frame and the limiting frame abut against a