The invention relates to a method for recovery processing sulfur-containing mixed waste gas in the production of viscose, which belongs to the technical field of the treatment of sulfur-containing waste gas in the production of viscose. The invention provides a novel technical route for the existing waste gas treatment situation of the viscose production enterprise, the sulfur-containing waste gas of low concentration is pretreated firstly, then the sulfur-containing waste gas is selectively absorbed by adopting the spraying absorption technology, then the absorption liquid is treated, and finally a product with high cost performance is obtained. The technical route is high in industrialization degree, the mixed waste gas consisting of low-concentration H2S, CS2, vast air and little solid waste in the production process of viscose industry can be effectively treated in time, certain economic benefit and social benefit also can be obtained, the technical feasibility and economical feasibility are good, and the sustainable development requirement of the society can be met.