The present invention disclosed a kind of inverse infiltration device. This device is by the first osmotic device, the first liquid turbine, the first pressure recovery device, the first regulatory valve, the pressure reducing valve, the evaporator, the thick solution loop pump, the bypass passage,Soluble pressure pump, second pressure recycler, bypass -driven solution booster pump, second regulatory valve, second liquid turbine, condenser, condenser water pressure pressure pump, second osmotic pump, thick solution pressure pump, thick solution pressure pump, thick solutionThe solution pressure pump, cooler, etc. are composed.The invention uses the inverse decompression infiltration process between the solution / solution system to reduce the inferiority difference between the general solution / water system, and increase the utilization rate of liquid pressure contained in the solution itself.