The production and thermostability of endoglucanase are critical to its application in industry. In this study, a high-activity endoglucanase gene fragment from rumen fungus and a thermostabilizing domain from thermophilic fungus were ligated together using P. rhizinflata 2301 and S. racemosum BCC18080 as parents. Then the hybrid gene was expressed in E. coli and the silkworm pupae, respectively. The biochemical properties of the hybrid enzyme were assessed and a rat feeding trial was conducted to ev...