The invention discloses a method for producing glass fiber by using spodumene slag as a fluxing and clarifying agent, which comprises the steps of weighing, batching, melting, passing through, wire drawing, drying and the like; the components are weighed according to the following parts by weight: Kaolin: 100-120, pyrophyllite: 150-410, quicklime: 150-200, dolomite: 50-70, colemanite: 50-70, leucolite: 130-310, fluorite: 20-30, lithium 10-30 parts of pyroxene slag, the sum of parts by weight of each component is 1000. The present invention uses spodumene slag as a melting flux clarifying agent, which can prevent deliquescent agglomeration of the prepared glass fiber, and the spodumene slag can reduce the refractoriness of kaolin, and does not need to keep the melting temperature stable, thus reducing industrial production. difficulty. Adopting the method provided by the invention to produce glass fiber not only reduces the cost, but also reduces the environmental pollution caused by slag, and has good economic and social benefits.