The invention belongs to the field of special storage, and more specifically relates to a combined modular three-dimensional warehouse, including a dock wall, a water warehouse system, a storage box mechanism, a lifting system, an electric fish system, a constant temperature warehouse system, a freezing warehouse system, and a water warehouse system. Including water tank frame, buoyancy rod, suction rod, sliding sleeve, track frame, support rod, storage tank mechanism includes box body, filter screen, material inlet, lifting system includes lifting rail, lifting sleeve, connecting rod, suction cup Ⅰ, The electric fish system includes discharge heads, conductive rods, and electric fish tanks. The constant temperature warehouse system includes warehouse bottom plates, wall tanks, warehouse tank frames, guide rail rods, warehouse outlets, and conveyor belts. The frozen warehouse system includes freezers, sealed rolling doors, and rotary conveyor belts. , opening and closing door, rotating table, hanging tower frame, cable, suction cup II; its beneficial effect is: the seafood obtained from fishing operations can be temporarily stored in the original ecological state, and at the same time, it has a certain ability of fishery processing. Reduce floor area and improve utilization rate. Improve the efficiency of warehousing and warehousing and complete sorting and sorting.