The invention discloses a method for vacuum microwave concentration of fruit juice. The method comprises the following steps: performing vacuum-pumping on raw fruit juice, performing microwave heating, and monitoring the temperature of the raw fruit juice, wherein the temperature at the beginning of heating is lower as heat is absorbed by evaporation of the raw fruit juice; reducing the heating power when the temperature of material begins to rise and exceeds 50 DEG C; and stopping heating when the temperature of the material achieves 60 DEG C. By adopting the method, the concentration temperature is low, the concentration speed is fast, the quality of the obtained fruit juice is high, and the inherent flavor is not lost basically after dilution. Simultaneously, by adopting the method, equipment has small possibility of scaling, and the energy consumption is low.