Abstract: A display rack comprises a plurality of display rack modules connected with each other laterally side-by-side to be fixed on wire shelves in a display case. A display rack module comprises a channel base secured on a wire shelve of a display case, and a channel tray mounted slidably on the channel base. The channel tray has a pair of guide grooves along the longitudinal sides of the bottom, a front stopper and a rear stopper formed between the pair of guide grooves. The channel base has a pair of L shaped longitudinal projections on the upper surface to be slidably engaged with the guide grooves, and has at least a stopper at the front of the upper surface, which contacts the front stopper in displaying mode and contacts the rear stopper in refilling mode.