The invention discloses a strip paper hot air energy-saving dryer comprising a plurality of dryers, a front power transmission set and a back power transmission set. Each dryer is formed by a stereoscopic rack, a heat discharging body, a hot air conveying bus pipe and a powerless transmission roller; the dryers are connected with each other via connection plates; a strip paper inlet is formed in two layers of powerless transmission roller surface of the front end dryer; a strip paper outlet is formed between a lower roller of a lower roller set of the back power transmission set and a supporting plate; a piece of strip paper passes through the inlet and then operates along the surface of the powerless transmission roller; the strip paper is sent out of the outlet via the upper power transmission roller set, the middle power transmission roller set and the lower power transmission roller set; hot air is conveyed into a pipe port of the hot air conveying bus pipe and then discharged out of a heat discharging hole of a heat discharging pipe; and then the operating strip paper is heated and dehumidified, and at last drying is achieved. The strip paper hot air energy-saving dryer is energy-saving and environment-protective and possesses great economic benefits, thereby being suitable for drying for various strip paper and especially for firecrackers.