The concurrent flow grain dryer mainly consists of drying sections, tempering sections and cooling section. It adopts concurrent drying and counter flow cooling technology. Each drying section is followed by a tempering section, to result a long and thorough drying. Clean hot-blust is adopted as drying medium in this type of dryer. It is suitable for drying of highly moist maize and paddy such as Northeastern China Canada, Russia, Ukraine, East European,East and North European.