Water-saving device for vegetable washing sink of small-sized canteen

The utility model relates to a small-sized canteen vegetable washing sink water-saving device which comprises a hand-pulling three-way device, a hand-pushing flat car, a water collecting tank and a mop spin-drying barrel, a water inlet is connected with a water outlet pipe of a vegetable washing sink, one water outlet is connected with a three-way sewer pipe through a pipeline, the other water outlet is connected with the water collecting tank through a water collecting pipe, and the mop spin-drying barrel is connected with the water collecting tank. A blow-off pipe and an overflow pipe are arranged on the water collecting tank, and the overflow pipe is communicated with the three-way sewer pipe through a hose. In the using process, when the washing water is dirty, the washing water flows away according to the original sewer pipe, when the washing water is clean, the washing water is manually poked through the hand-poked three-way device, the valve in the sewer pipe is opened, clean vegetable washing water is