The utility model discloses a water-saving and fertilizer-saving drip tank device. The device comprises a water storage tank, a small air compressor and a small water suction pump, a small air compressor is mounted at one end of the water storage tank through a mounting frame, and a small water suction pump is mounted at the other end of the water storage tank through a mounting frame; a medicinestorage barrel is fixed to one side of the water storage tank through a fixing frame, and a metering and dosing pump is mounted at the top of the medicine storage barrel through a mounting frame; an anti-corrosion layer is arranged on the outer surface of the pesticide storage barrel, a heat insulation layer is arranged on the outer surface of the anti-corrosion layer, a stirring rod is fixed to an output shaft of a motor at the top of the water storage tank through bolts, and the stirring rod is located in the water storage tank. The liquid level switch is arranged to control the small watersuction pump to automatically add water, the metering dosing pump is arranged to automatically add chemicals, meanwhile, the motor is arranged to drive the stirring rod to stir, meanwhile, the throttling valve is arranged to control the flow speed of fertilizer and water mixing, the throttling purpose is achieved, and the fertilizer and water mixing device is suitable for being widely used and popularized.