Researches on dent resistance property and the relationship among dent resistance， mechanical property and bake- hardening property of 6016 aluminum alloy have been carried out by means of mechanical properties test，bake- hardening property test and dent resistance test. The results indicate that after two years natural aging，the strain hardening exponent nvalue and elongation of 6016 aluminum alloy sheets increase. With 30 min baking at different temperatures，strength of the sheets increases. The bake-hardening values remarkably increase with temperature rising. The sheets exhibit good bake-hardening property. The dent resistance property is related to baking process. The higher the baking temperature is which leads to higher strength，the better the dent resistance property of the sheets will be.