Straw degradation was slow under low temperature environments. A cold-tolerant consortium LHWA was constructed by Bacillus cereus, Acinetobacter lwoffii, Penicillium griseofulvum, and Talaromyces funiculosus. The consortium and culture conditions were optimized. Under 4 °C cultivation, liquid fermentation showed a 55.52 % straw weight loss rate after 30 days with inoculum (8.4 %, w/v), peptone (0.4 %, w/v) and Fe