The invention discloses a method for preventing galvanized steel strips from having sinking roll marks. The method comprises the following steps: detecting grooves of sinking rolls; and when the grooves of the sinking rolls meet requirements, mounting the sinking rolls to a zinc pot region of a continuous hot-dipped-galvanized line. The galvanized steel strips are prevented from having the sinkingroll marks, therefore, the surface aesthetic degree of the galvanized steel strips is improved, and thus, requirements of car panels are met.