The invention discloses a glass cup packaging box integrating buffer packaging and sales packaging. The glass cup packaging box comprises two buffer cushion plates with the same size, wherein each buffer cushion plate comprises a cushion bottom plate and a cushion side plate; one side in the width direction of each cushion bottom plate and one side in the width direction of the corresponding cushion side plate are superposed and pressed with a first folding mark line, a minor-arc folding mark line is pressed on each cushion bottom plate, and the highest point on each minor-arc folding mark line is the midpoint of the corresponding first folding mark line; a first opening is vertically formed between two end points at the two ends of each minor-arc folding mark line and the other side in the width direction of the corresponding cushion bottom plate respectively; and a first semicircular hole is formed in a part limitlessly close to the corresponding first folding mark line, on each cushion side plate, and a second semicircular hole is further formed in the cushion side plate. The glass cup packaging box disclosed by the invention is integrally produced, so that most of materials is saved, and assembly is convenient; and meanwhile, the shapes of the packaging boxes are relatively complemented during stacking, so that losses during stacking and transportation are reduced to a larger extent, and a display function is realized.