In order to study the effect of laser direct part marking (DPM) on the mechanical properties of aluminum alloy 2024, the marking depth, microhardness, static tensile test and high cycle fatigue test were carried out on the marked aluminum alloy 2024. The results show that the marking depth varies greatly under different process parameters, ranging from 5.26 μm to 525.7 μm; recast zone will be formed in the marking area, and the microhardness is 51-62 HV, which is significantly less than the microhardness value of the material matrix; the marking depth will affect the tensile properties and fatigue properties of aluminum alloy 2024, and the tensile properties of aluminum alloy 2024 after marking at a certain marking depth will be improved The energy and fatigue properties are equivalent to the tensile and fatigue properties of normal materials.