Disclosed is a kind of combination fireworks, in which a plurality of paper tubes form a tube row, and the plurality of tube rows are stacked and assembled for forming, wherein each tube row is provided with a bottom cardboard, two sides of the bottom cardboard are correspondingly provided with notch positioning holes, and the bottom cardboard beside the notch positioning holes forms the protruding cardboard beside the holes; the cardboard beside the holes is folded and stuck on both sides of the paper tube, and both ends of the paper tube are respectively embedded in corresponding notch positioning holes. The structure of spaced tube rows is adopted, so that the radial size error of the tube body of the paper tube is not accumulated in the tube rows, thus allowing the tube body to accurately reach a predetermined work position, and improving the accuracy and reliability of subsequent processes.