This utility model discloses a marine containerized power supply, relating to the field of containerized power supply technology. The utility model includes a container body; several battery module assemblies are fixedly installed at the bottom of the container body. Each battery module
assembly includes a frame, and several L-shaped support plates arranged in a
linear array are symmetrically fixedly connected to opposite sides of the frame. A first baffle is fixedly connected between two L-shaped support plates at the same horizontal level, and several heat dissipation holes are evenly distributed on one side of the baffle. A first rotating shaft and a second rotating shaft are rotatably connected to the bottom of the frame. This utility model, through the use of this device, allows several batteries on the frame to be simultaneously sealed and fixed, and to be simultaneously disassembled, while avoiding the use of several bolts required for traditional battery fixing. This reduces the number of steps involved in installing several batteries, thereby reducing labor and improving the efficiency and convenience of battery installation and disassembly.