The invention provides a viscose wastewater resourceful treatment method, which comprises the following steps: sequentially carrying out neutralization aeration, coagulating sedimentation, advanced oxidation, primary softening clarification, ultrafiltration, reverse osmosis, concentrated water softening clarification, filtration, ion exchange, concentrated water reverse osmosis, high-pressure reverse osmosis, forward osmosis, evaporative crystallization, potassium sulfate conversion, sodium chloride crystallization and mother liquor drying treatment on viscose wastewater so as to achieve reuseof all the wastewater and produce potassium sulfate and sodium chloride crystalline salts. According to the method, zero discharge of viscose wastewater is realized, and water is completely recycledthrough membrane concentration and evaporative crystallization so as to avoid pollution to the external environment; multi-stage reverse osmosis and forward osmosis processes are comprehensively utilized, so that the load of a thermal evaporation stage is greatly reduced, the method has the advantages of low energy consumption and high efficiency, and the operation and investment cost of the system can be reduced; and the produced sodium sulfate is converted into potassium sulfate with high value, and the potassium sulfate can be used in the chemical fertilizer industry, so that the problem ofwater pollution of fiber production enterprises is solved, and high economic value can be brought.