The invention discloses a transformation ratio accumulation roller conveying device. The device is provided with a stander, wherein the stander is horizontally provided with a plurality of rollers through a supporting shaft; one end of each roller is connected with a twin chain wheel; the rollers are provided with a plurality of trays; the stander is also provided with a motor; a motor shaft is provided with a driving chain wheel; the driving chain wheel simultaneously drives and is connected with a pair of chain wheels in two adjacent twin chain wheels through chains; and other twin chain wheels are arranged in a staggering way and are in transmission connection with one another through a plurality of inner and outer chains. The device is characterized in that: the plurality of rollers which are arranged on the stander are divided into an input working section, an input accumulation section, an irradiation working section, an output accumulation section and an output working section;the input accumulation section and the output accumulation section are provided with at least one transformation ratio twin chain wheel respectively; and other twin chain wheels are equal-ratio twin chain wheels. Through the device, irradiated objects can be input and output at large intervals and pass through an electronic scanning window at a set constant speed at small intervals, so that the energy irradiation of an accelerator can be fully utilized, and the irradiation efficiency can also be improved.