The embodiment of the utility model provides a multi-effect evaporation and concentration system, relates to the technical field of evaporation and concentration, and aims to solve the technical problem of low energy utilization rate. The multi-effect evaporation and concentration system comprises a first-effect evaporator and a first-effect steam-water separator connected with the first-effect evaporator, The second-effect evaporator is a second-effect steam-water separator connected with the second-effect evaporator; The multi-effect evaporation and concentration system further comprises a first ejector and a second ejector, Wherein a first ejection opening of the first ejector is in butt joint with a steam outlet of the first-effect steam-water separator, a first outlet of the first ejector is in butt joint with a steam inlet of the first-effect evaporator, and a first drainage opening of the first ejector is in butt joint with a second inlet of the second ejector; A second ejectionopening of the second ejector is in butt joint with a steam outlet of the second-effect steam-water separator; According to the multi-effect evaporation and concentration system provided by the embodiment of the utility model, the number and positions of the ejectors are reasonably configured, so that the energy consumption is reduced, and the utilization efficiency of energy is improved.