An integrated cellular board edge-sealing die is provided with male dies and female dies; the main bodies of the male dies are polygonal columns; the main bodies of the male dies are identical to polygonal grates in cellular boards to be prepared in shape; the number of the main bodies of the male dies are the same as the total of the polygonal grates; the male dies are positioned in a bottomed frame-type female die singly or integrally; gaps are formed among the main bodies of the adjacent male dies; solidified material is injected to the female dies in a casting manner, and then the female dies are demoulded; a gap between the main bodies of the two adjacent male die is formed into a polygonal grate barrier; a cavity between the lower parts of the main bodies of the male dies and the bottom plates of the female dies is formed into a lower plate with a polygonal grate cellular structure; and casting material after covering the main bodies of the male dies is formed into an upper plate with a polygonal grate cellular structure. The utility model is characterized in that in the main bodies of the male dies in the frame-type female die, gaps are formed between the male dies, which are from the edge at the near end of the inner side of the frames of the female dies, and the inner sides of the frames of the female dies, and form sealed edges of the cellular boards formed after the solidified material is cast.