Abstract: In order to study the influence of different forging conditions on the microstructure of near-eutectic Al-Si alloy Al-11.5Si-2Cu-0.5Fe,Al-11.5Si-2Cu-0.5Fe aluminium alloy was forged by converging dies at the forging temperatures of 300, 400 and 500 ℃, and the forging ratios of 1.5 and 2.0, and the microstructures and precipitation phases of the aluminium alloy were observed by optical microscope and X-ray diffractometer. The experimental results show that as-cast Al-11.5Si-2Cu-0.5Fe aluminium alloy forms a variety of complex intermetallic compound phases, such as β-Al4.5FeSi phase and Al2Cu phase. In the forging process, the microstructure of Al-11.5Si-2Cu-0.5Fe aluminium alloy is significantly refined, while the coarse particles rupture and fragment. When the forging temperature increases, Si particles grow up, and the grain refinement weakens. When the forging ratio increases, Si particle fragmentation increases, the grain refinement is more obvious, and the best refinement effect is obtained at 300 ℃ and the forging ratio of 2.0. Thus, this study provides a theoretical basis for the microstructure change of Al-11.5Si-2Cu-0.5Fe aluminium alloy during the actual forging production process.