This document stipulates the basic requirements, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage and quality commitment of fiber web-yarn type flame-retardant elastic stitchbonded nonwovens. This document is applicable to non-woven fabrics used for covering products, which are made of flame-retardant viscose fiber and elastic yarn as the main raw materials, and are made through mechanical carding, web formation, and stitching and consolidation.