The invention discloses a pure-electric-energy spiral blade circulating type grain dryer which is integrally cylindrical. A small cylinder is arranged on the bottom of a cylindrical housing, the upperend of the small cylinder is equipped with an inverted table shape, the inverted table shape is connected between the small cylinder and the housing; a plurality of electric-heating fans are arrangedon positions, below the inverted table shape, at the periphery of the small cylinder; a conveying barrel, a rotary shaft and a spiral blade are arranged inside the housing; an inclined partition plate is arranged between the housing and the conveying barrel; a grain unloading hole is formed in the inclined partition plate; after to-be-dried grains enter the cylindrical housing, the grains are dried by heat energy generated by the electric-heating fans between the housing and the conveying barrel, and the grains are circulated through the spiral blade, so that circulatory drying is realized. The pure-electric-energy spiral blade circulating type grain dryer has the effects of realizing energy saving and environmental protection, and enabling water content of the grains to be more consistent after the grains are dried.