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For the low productivity, high energy consumption and low briquette quality of biomass briquetting machine, the principle of vertical ring die was used. A biomass briquetting machine was developed. A ring mold with heating resistor and cooling waterways was designed. The crushed corn straw was taken as raw materials for the experiment. The experiment result showed that the production rate was 2.1t/h. Tons of power consumption was 35.6kW· h/t. Machine noise was 82dB (A). The molding rate was 95.4%. The forming density was 1.1g/cm 3 . The indicators could reach the design and standard requirements. It could shorten the pre run time by 50min to 65min by using the heating resistor. The ring mold takes cooling device. The temperature of the fuel could be reduced by 20℃ to 30℃ and the production can be increased by 5% than non adopted in normal production.