The utility model relates to a waste water treatment field discloses high -salt -content wastewater processing apparatus of thermal power plant. This effluent treatment plant includes: useless pretreatment of water unit (A), the concentrated unit (B) of membrane and evaporation crystal unit (C), wherein, useless pretreatment of water unit (A) is used for filtering the high -salt -content wastewater of thermal power plant, soften, obtains demineralized water and mud, the concentrated unit of membrane (B) is linked together with useless pretreatment of water unit (A), be used for with the demineralized water carries out concentrated decrement, obtains strong brine and fresh water product water, evaporation crystal unit (C) is linked together with the concentrated unit of membrane (B), be used for with the strong brine carries out crystal separation, obtains salt crystal and distillation aquatic products water. The device can reduce the scale deposit, have simple structure, convenient operation, the energy consumption is low, the evaporation water volume is big, energy -concerving and environment -protective, investment cost low and the running cost is low advantage.