Abstract:To explore promoting conditions of solid fermentation degrading corn straw by Trichoderma viride. Using Trichoderma viride as experimental materials， the conditions for cellulose production were studied by sol－ id fermentation. The influences of the culture conditions， including medium， a surfactant， inducers， pH buffering system， enzyme-time curve and maximum enzyme production was obtained. The result showed that there was significant difference in cellulase activity produced by Trichoderma viride under different conditions （P<0.05）.It was found that optional conditions for fermentation of corn straw were based on culture at wheat bran and corn straw in the ratio of 1.5 ∶ 1（mass ratio）， under 6.0 pH， with the medium liquid of 1 ∶ 2.5（g/mL）， ac－ cording to the medium dry ammonium sulfate 2 % was added. Using the pH buffer system for enzyme production advantageously， a surfactant is added and appropriate type of inducer enzyme production could be improved， and the high concentration of inducer may decrease the amount of enzyme production. The research provided certain theoretical basis for the transformations and the application of Trichoderma viride on straw.