The invention discloses a water supply system for an intelligent pipe gallery fire protection device. The water supply system comprises a device body, the device body is composed of a base, a water tank, a water supply pump and a water suction pump, the base is located at the bottom end of the device body, the water tank, the water supply pump and the water suction pump are located on the upper side of the base, the bottom end of the water tank is connected with the upper side of the base in a welded mode, one end of the water supply pump is provided with a water inlet pipe, the upper side ofthe water inlet pipe is provided with a guide pipe, the bottom end of the guide pipe is connected with a water supply pump through a connection flange, the guide pipe is connected with the upper end of the water tank in a penetrating mode, one side of the water supply pump is provided with a PLC, the PLC is connected with the water supply pump through a wire, and the water suction pump is locatedat the end, away from the water supply pump, of the water tank. When the water supply system is in use, the water suction pump is covered with the shell, a drying agent inside a first filler box willdry air inside the shell, it is ensured that dryness of surrounding of the water suction pump is kept, and the water suction pump is protected.