Abstract: In grain drying with mechanical equipment, biomass is used to replace conventional energy fuel, which is of great significance for energy conservation, emission reduction, cost reduction and grain quality improvement．A set of biomass pellet hot blast furnace was designed and integrated with grain dryers．The hot blast temperature was adjusted by automatic temperature control system to obtain high-quality grain．Biomass pellet were automatically fed under control of time relay．Primary air inlet and secondary air inlet were distributed in the furnace．The volatiles of pellet fuel were fully burned, which improved output heat power of hot blast furnace．A fault alarm and remote monitoring system were set up to improve equipment intelligence．The performance test in the grain drying plant showed that complete set of equipment operated stably and had excellent performance indexes, which verified rationality of the design．Economic benefit analysis showed that cost of drying grain with biomass pellet hot blast furnace was low, which had obvious economic benefit and application prospect．