Abstract: Aiming at problems of low production efficiency, unstable equipment operation, poor production continuity and high energy consumption caused by external heat source heating, a double-cylinder rotary continuous biomass pyrolysis carbonization equipment was designed and developed by using biomass pyrolysis carbonization scheme of pyrolysis combustible gas reburning．Structure and working principle of pyrolysis carbonization equipment were introduced in detail, and pyrolysis carbonization test was carried out with corn straw as raw material．Test results showed that pyrolysis temperature was 450 °C, average residence time of material was 30 min, pure hour productivity of carbonization equipment was 103.8 kg/h, biochar yield was 34.6 %, and carbon temperature was 47 °C．All performance indexes met design requirements, and continuous operation of biochar production could be realized．