Cold and hot alternate withering device and process for black tea processing

The invention relates to a cold and hot alternate withering device for black tea processing. The cold and hot alternate withering device comprises a lifting mechanism, wherein a rotating mechanism isarranged at a power telescopic end of the lifting mechanism; an even number of hoisting components are symmetrically arranged on the rotating mechanism in the same horizontal plane at equal intervals;a hollowed-out tea placing groove is connected to the lower portion of each hoisting component in a hoisting manner; each tea placing groove is separately placed on a corresponding withering box; anair drying component is arranged on an end surface of each withering box; and the air drying components on the adjacent withering boxes respectively transmit different cold and hot wind energy. A coldand hot alternate withering process for black tea processing comprises the following steps of S1, spreading fresh tea leaves in the tea placing grooves; S2, adjusting the cold and hot wind energy inthe withering boxes; and S3,