The invention relates to a vegetable washer, in particular to a water-saving disinfecting vegetable washer. The invention solves the problems that water resources are wasted, manpower cost is overhigh and vegetables and meat are not washed thoroughly when the vegetables and meat are washed manually in dining halls of enterprise and public institutions, catering agencies and food processing enterprises in the prior art. The water-saving disinfecting vegetable washer comprises a washer body, and a vegetable washing trough; a first water inlet on the bottom of the vegetable washing trough is connected with a water inlet pipe with an inlet valve, an outlet is connected with a drain pipe, and the drain pipe is sequentially provided with a drain valve, a three-way pipe and a wash-out valve; theother end of the three-way pipe is connected with a water inlet of a water pump through a communicating pipe; the communicating pipe is sequentially provided with a filter unit and an ozone disinfector; and an inserting baffle is movably arranged longitudinally in the vegetable washing trough to separate the vegetable washing trough into a vegetable washing area and a filtering area. The water-saving disinfecting vegetable washer is simple in structure and skillful in design, and can be widely applied to dining halls of government offices, troops, schools and large enterprises, catering agencies and food processing enterprises.