The invention discloses an ejection and flash evaporation circulated concentration device which comprises a tank body, a snakelike heating pipe vertically arranged in the middle of the tank body, at least two circulating ejectors peripherally arranged around the outside of the tank body at intervals, a liquid distributor, a steam uniformizing device installed on an upper end sealing cover of the tank body, a vacuum pump system, and a cooler. A steam outlet is formed in the upper end sealing cover of the tank body, and a drain outlet is formed in a lower end sealing bottom. The liquid distributor comprises a liquid inlet pipe and a liquid distributing plate, wherein the liquid distributing plate is installed in the tank body and located above the snakelike heating pipe, and the liquid outlet end of the liquid inlet pipe penetrates through the upper end sealing cover of the tank body and then is connected with a liquid inlet. The inlet end of the vacuum pump system is connected with the steam uniformizing device through a steam leading-out pipe. A cooling inlet of the cooler is communicated with the outlet end of the vacuum pump system. The ejection and flash evaporation circulated concentration device is rapider in vacuum concentration, higher in concentration rate, smaller in size and lower in manufacturing cost compared with pure heating through a thin film and is suitable for concentration and processing of water-soluble organic fertilizers.