Telescopic express conveying and sorting device

The invention discloses a telescopic express conveying and sorting device. The telescopic express conveying and sorting device comprises a power plant, a rack extension and retraction control mechanism, an outer rack, an inner rack and a conveying belt, wherein the outer rack is of a telescopic structure, a part of the conveying belt is arranged on the top of the outer rack, the other part of theconveying belt is arranged in the outer rack, and a plurality of fixed rollers which are used for bearing the conveying belt are arranged on the outer rack; the inner rack is arranged in the outer rack and is provided with a floating roller, and a part of the conveying belt located in the outer rack is wound on the floating roller; the rack extension and retraction control mechanism is arranged inthe outer rack, and a feed screw nut and a gear rack multistage linkage mechanism are adopted so as to guarantee the synchronous movement of the conveying belt and the racks during telescopic movement of the telescopic expres