In this paper, the wheat bran used as raw material, bacillus subtilis and trichoderma koningii as culture and the crude protein content as the index, and the orthogonal experimental method was used to study the conditions for producing solid fermenting microbial protein feed bysingle bacterium and mixed bacteria solid. The optimum conditions of mixed fermentation: 32 ℃ of fermentation temperature, 20% of water content, 1︰3 of inoculation ratio(trichoderma koningi: bacillus subtilis) and 72 h of fermentation...