The invention discloses winnowing equipment for pulping by a dry method. The winnowing equipment comprises a fluffer, a drum type powder removing machine, a primary negative pressure type wind screening machine, a secondary negative pressure type wind screening machine, a fan, a winnowing collector and a coarse residue collector. The invention further discloses the application of the winnowing equipment to pulping by the dry method. The winnowing equipment is easy to operate, low in energy consumption and sealed completely, has no pollution and is safe and reliable. By adoption of the drum screen type winnowing mode, the qualified rate of the selected products can be guaranteed completely.