Abstract: 【Objective】 Selective laser melting(SLM)-fabricated aluminum alloys hold enormous application potential for the manufacture of aluminum alloy sports equipment, yet further refinement and expansion are still required in terms of process optimization, standardization and large-scale application.【Method】 The effects of aging temperature(100-400 ℃) and aging time(0-24 h) on the microstructure and mechanical properties of Al-7.8 Si-2.58 Mg-0.12 Zr alloy for SLM(selective laser melting) forming sports equipment were studied using scanning electron microscopy, hardness tester, and tensile testing machine. 【Result】 The phases of SLM formed aluminum alloys in the as printed and aged states at 100, 150, 200, and 300 ℃ are mainly composed of α-Al, Si and Mg2 Si phases; The microstructure of SLM formed aluminum alloys in the 150 ℃ aged and printed states is similar, with network like and a small amount of granular eutectic Si visible in the matrix structure; When the aging temperature rises to 200 ℃ or above, the network eutectic Si structure decomposes, and as the aging temperature increases, the Si phase particles coarsen, grow, and decrease in quantity. The microhardness of SLM formed aluminum alloy in aging state increases first and then decreases with the increase of aging temperature, and reaches its maximum value(191.3 HV) when the aging temperature is 150 ℃; At an aging temperature of 150 ℃, the microhardness of SLM formed aluminum alloy increases rapidly with the prolongation of aging time. As the aging time is extended from 2 to 24 h, the tensile strength and yield strength of SLM formed aluminum alloy in the aging state first increase and then decrease, reaching their maximum values at 12 h. This is mainly related to the form of Mg2 Si phase and Si particles that play a role in the second phase strengthening. 【Conclusion】 The Al-7.8 Si-2.58 Mg-0.12 Zr alloy for SLM formed sports equipment achieved maximum tensile strength and yield strength at an aging temperature of 150 ℃ and an aging time of 12 h, which increased by 12.21% and 12.81% respectively compared to the printed state. This can provide reference for optimizing the process parameters of SLM formed aluminum alloys and help promote the improvement of mechanical properties and application of Al-7.8 Si-2.58 Mg-0.12 Zr alloy for sports equipment.