In this study, early indica rice and soluble soybean polysaccharide (SSPS) were used as materials. Single-screw and twin-screw extrusion processes were employed to investigate the impact of SSPS on the cooking and eating quality of rice noodles through chroma, textural properties, cooking quality, and sensory quality determinations. Then, the effect of SSPS on the quality of rice noodles was characterized through pasting properties, rheological properties, and X-ray diffraction (XRD) determinations based on the optimum addition of SPSS. The results demonstrated that the addition of SSPS improv...