Width-adjustable tray medicine storage structure, adjusting method thereof and automatic medicine selling machine

The invention relates to a tray medicine storage structure, and aims to solve the technical problem that in the prior art, a goods channel of an automatic medicine selling machine cannot be generally used for placing other medicines with any external dimensions, so that the types of the medicines which can be placed on the automatic medicine selling machine are seriously limited. According to the width-adjustable tray medicine storage structure, the adjusting method thereof and the automatic medicine selling machine, a rear flange is fixedly arranged on the long edge of the rear side of the upper surface of a tray, the two sides of the upper surface of the tray are each provided with a side flange, and a plurality of side flanges located between the two side flanges are further arranged on the upper surface of the tray; the sliding partition plate is connected to the rear flange; the slidable partition plate comprises a bottom plate, and the lower surface of the bottom plate is attached to the upper surface o