Abstract: To enhance the resourcelization of algae biomass, the corn stover was used as the co-digestion substrate for biogas productioin. Results showed that the biogas yield was improved significantly in the co-digestion process compared to that using only corn stalk or algae biomass. When the ratio of corn stalk, algae biomass and sludge was 2:8:1, a maximum value of 687.3 mL/g VS with methane content of 63.3% was achieved. Simultaneously in the aqueous phase, the concentration of phosphate, total carbon and total organic carbon were the highest. Results indicated that digestion efficiency of algae biomass was promoted significantly in this case.