The invention discloses a polymer contained liquid membrane of indium, a preparation method and applications thereof, wherein the raw materials comprise a polymer, a volatile solvent and a carrier. The preparation method comprises a solvent evaporation method. According to the present invention, the material liquid phase solution and the back extraction phase solution are separated with the polymer contained liquid membrane; and by adjusting the suitable acidity environments of the material liquid phase and the back extraction phase, indium (III) is extracted from the low-concentration material liquid while desorption is performed in the back extraction phase so as to separate and enrich indium (III).