The invention relates to a technology used for manufacturing mucilage glue coarse denier flat yarns. The technology comprises the following technology steps of mucilage glue preparing, primary consolidation forming, secondary consolidation forming, primary water washing, refining and cylinder forming or twist forming, and carbon disulfide is recycled when primary consolidation forming and secondary consolidation forming are conducted. According to the technology, the carbon disulfide is recycled and used, direct high-altitude emission will not occur any longer, and pollution to the environment is lowered. Meanwhile, production cost of enterprises is reduced, strength and elongation of the mucilage glue coarse denier flat yarns manufactured in the technology completely meet requirements, and the technology is very beneficial for development of the lower-reach market.