A vegetable washing method capable of separating and splitting impurities and a machine therefor. The method comprises putting fruit and vegetable into a washing basket, then driving the wash basket to rotate by an electric motor so as to force water flow to circulate repeatedly, as a result separating the impurities and the vegetable. The method has the following three technical features of A, B and C, or at least has one of them. A. using a method for preventing the impurities thrown outside the washing basket together with the water from circularly falling into the basket again together with the water to gradually purify the vegetable in the basket； B. using a vortex center draining method to discharge the sewage and impurities； C. using a method for making the vegetable in the washing basket periodically centripetal and centrifugal motion to flip and turn the placement angle of the vegetable in the basket. The vegetable washing method enables the impurities of different specific gravities to split into different spaces, and then to be removed.
