The present invention discloses a highly-efficient and energy-saving vegetable washing device. The highly-efficient and energy-saving vegetable washing device comprises a first washing mechanism, a second washing mechanism and a water box. The first washing mechanism comprises a first shell body, a first sieve, a second sieve and a first partition baffle are horizontally arranged from top to bottom inside the first shell body, an upper surface of the second sieve is provided with an annular slide, a first material guiding mouth, a push rod and a cover body, a lower surface is provided with a first material guiding pipe communicating with the first material guiding mouth, the first partition baffle is provided with a plurality of first through-holes, and a lower end of each of the first through-holes is hingedly connected with a valve plate; and the second washing mechanism comprises a second shell body and an inside of the second shell body is provided with a second material guiding pipe, a water storage tank, a rotating frame, a stirring rod and a plurality of second partition baffles. By designing the two washing mechanisms, the highly-efficient and energy-saving vegetable washing device realizes twice washing process operations for vegetables, and the twice washing processes are automatically continuous. Besides, the highly-efficient and energy-saving vegetable washing device is simple in structure, easy to operate, and highly-efficient and energy-saving in washing, and has relatively high market promotion value.