The extrusion properties of 13 species of extruded samples made in different parameters, and ordinary rice was studied. The correlations among gelatinization degree, thermal properties, expansion ratio, the water absorption index, water solubility index, etc were discussed. The results showed that negative correlation between the expansion ratio and the springiness(r=—0.583), resilience(r=—0.757); The correlation between the water solubility index and resilience was significantly positive(r=0.613); The bulk density performed significant...