The invention relates to a secondary supplement engraving method in gravure plate-making. The method includes steps in sequence as follows: (a) determining a horizontal engraving-starting position of a roller, namely, installing a roller which needs supplement engraving onto an electric engraving machine, and moving an engraving needle so as to coincide the engraving needle with the center of the first horizontal grid of a tentative engraving block; (b) determining a circumstantial engraving-starting position, namely, adjusting the distance between the engraving needle and the first horizontal grid of the tentative engraving block so that the distance is the same as a distance between the engraving needle and the first horizontal grid of a tentative engraving block of an original roller; and (c) performing supplement engraving, namely, engraving supplement patterns to be supplemented in the roller which needs supplement engraving. According to the method, the engraving needle is moved so as to coincide the engraving needle with the center of the first horizontal grid of a tentative engraving block, and the distance between the engraving needle and the first horizontal grid of the tentative engraving block is adjusted so that the distance is the same as the distance between the engraving needle and the first horizontal grid of the tentative engraving block of the original roller, thus accurately determining the position of secondary supplement engraving, avoiding leaks and pattern overlap, reducing the rework rate, saving the cost and the time, and shortening the product delivery time.