The invention belongs to the technical field of an emergency repair box, and in particular relates to a marine portable emergency repair box. The marine portable emergency repair box comprises a box body and a box cover, wherein a machine body module, a function module and a gas cylinder are arranged in the box body, and the machine body module comprises a power source module and a welding machine; and the function module comprises a miniature grinding machine, a miniature cutting torch, miniature welding tongs, a small welding rod storage box, protective glasses, insulating gloves and a cablepipeline. As the power source module is arranged in the box body, power protection for boats is not needed during repair. The power source module can be charged. The connection between batteries andthe emergency repair box body is simple, the dismounting is easy, and multiple batteries can be used for providing sufficient power supply for repair. The box body is compact in inner design, small insize, light in weight, convenient in movement, high in reliability and safe and stable. Repair tools in the box body adopt miniature repair tools, and thus the volume of the box body is reduced. A socket is connected onto the power source module, so that the power source module can provide a temporary power source for other equipment.