Conveying device capable of preventing belt from deviating

A conveying device capable of preventing a belt from deviating comprises a machine frame, a conveying belt, an upper blocking roller and a lower blocking roller, the conveying belt is arranged around the machine frame and comprises an upper belt body and a lower belt body which are connected end to end, the upper belt body is located above the machine frame, and the lower belt body is located below the machine frame; two sets of upper blocking rollers are symmetrically arranged on the two sides of the top of the rack, the upper belt is located between the two sets of upper blocking rollers, the two sides of the upper belt are matched with the upper blocking rollers in a limiting mode, two sets of lower blocking rollers are symmetrically arranged on the two sides of the bottom of the rack, the lower belt is located between the two sets of lower blocking rollers, and the two sides of the lower belt are matched with the lower blocking rollers in a limiting mode. By means of the design, the conveying belt can be