Abstract: In order to investigate the effects on degraded products from Chinese silvergrass after steam-exploded pretreatment. Fermentable sugars and by-products of silvergrass was identified by IC and GC-MS analysis in this paper. The results showed that Fermentable sugars first increased and then decreased with the reaction temperature increasing and time prolonged. When processing condition explosing temperature was 220℃, pressure time was 5 min, reducing sugar yield reached the highest 117.4 mg/g. GC-MS analyzed steam explosion silvergrass aqueous extracted solution ethyl acetate extraction. It was indicated that 19 aromatic compounds, 11 weak acid compounds and 2 furan compounds were produced, the highest 3-methyl-2-furan formic acid relative content of 9.02%, accounting for furan compounds total relative content of 80.50%.