The invention provides an efficient water-saving vegetable washing machine. The efficient water-saving vegetable washing machine comprises a machine frame and a water tank fixedly arranged on one side of the machine frame. A vibrating screen is arranged at the upper end of the machine frame in an inclined mode, the lower end of the vibrating screen is connected with a vibrator, and a dirt recycling tank is arranged below the vibrating screen. A stirring device, heat exchange tubes, a heat conduction baffle and a heater are arranged in the water tank, the heat exchange tubes are arranged between the inner wall of the water tank and the heat conduction baffle, a water flow passage is reserved between the heat conduction baffle and the bottom of the water tank, the stirring device comprises a first rotating shaft, a second rotating shaft, a first stirring blade, a second stirring blade, a third stirring blade and a fourth stirring blade, the first stirring blade and the second stirring blade are sequentially installed on the first rotating shaft from top to bottom, and the third stirring blade and the fourth stirring blade are sequentially installed on the second rotating shaft from top to bottom. The efficient water-saving vegetable washing machine is simple in structure and principle, convenient to use, capable of thoroughly removing dirt and pesticide residues on the surfaces of vegetables and good in cleaning effect; meanwhile, a constant-temperature heating system is arranged, so that the efficient water-saving vegetable washing machine is suitable for being used in winter and convenient to popularize.