The invention provides a 6xxx-series aluminum alloy plate with high flanging performance. The aluminum alloy plate is prepared from the components in percentage by mass: 0.1%-1.4% of Mg, less than orequal to 0.35% of Cu, less than or equal to 0.3% of Mn, less than or equal to 0.3% of Cr, 0.3%-1.8% of Si, less than or equal to 0.45% of Fe and the balance of Al. The average grain size of a finishedaluminum alloy plate in the rolling direction is less than 30 [mu]m, and the ratio of the number of second-phase equivalent circles with the diameter greater than or equal to 2 [mu]m is less than 10%. By means of the technical scheme, second-phase distribution and grain sizes in aluminum alloy are effectively regulated and controlled, the plate flanging performance is greatly improved, and the obtained plate can be widely used as an automobile 6xxx aluminum alloy covering part outer plate.