利用自制的准固态力学性能测试装置，系统地研究了铝硅会金凝固过程准固态力学性能。从固相率的角度统一定义了铝硅合金准固态区。并深入讨论了铝硅合金准固态力学性能参数，即准固态温度区间、强度、断裂应变等对热裂倾向性的影响。 The quasi-solid mechanical properties of Al-Al alloy were studied systematically by using self-made quasi-solid mechanical properties testing device. Solid-state rate from the point of unified definition of Al-Si alloy quasi-solid zone. In-depth discussion of the Al-Si alloy quasi-solid mechanical properties parameters, namely the quasi-solid temperature range, strength, fracture strain on thermal cracking tendentiousness.