The utility model relates to the technical field of drying devices, in particular to a rotary lightning-fast evaporating dryer. The rotary lightning-fast evaporating dryer comprises an air blower, a feeding pipe, a degglomerator, a cyclone separator and a cloth bag pulse dust collector. The bottom end of the feeding pipe is provided with the degglomerator. The left end of the degglomerator is provided with the air blower. The upper end of the feeding pipe is connected with the cyclone separator. The upper end of the cyclone separator is connected with the cloth bag pulse dust collector. The front end of the air blower is provided with an air filter. The right side of the degglomerator is provided with an air suction device. The bottom of the cyclone separator is connected with an outlet of the air blower. The right side of the bottom of the feeding pipe is provided with a material adding device. An inclined face design is adopted for a feeing pipe opening of the material adding device. The inclined angle of the inclined face and the horizontal face is 60 degrees. The bottom end of the cloth bag pulse dust collector is provided with a discharging valve. The bottom of the discharging valve is provided with a material collection box. The material collection box is arranged on a conveying belt. The left side of the cloth bag pulse dust collector is provided with an induced draft fan. By means of the rotary lightning-fast evaporating dryer, a very smooth production line is provided, the rotary lightning-fast evaporating dryer is complete in device, safe and reliable, energy is saved, the environment is protected, materials can be reused, the cost is saved, and benefits are brought to enterprises.