An investigation was carried out to study the effect of squeeze casting process on the microstructure and properties of Al-7Si-0.4Mg-0.3Er alloy by OM, SEM and microhardness. The results show that the solidification sequence has great influence on the microstructure of different parts of bracket, the size of primary α-Al grains in the thick parts is smaller than the thin parts. The primary α-Al phase and Er-π-AlFeMgSi phase in bracket is smaller and more uniform distribution, which is fabricated by lower temperature of 650℃ and higher speed 2. The microhardness is 119HV and standard deviation is 5HV after heat treatment, the properties is more uniform distribution than the bracket fabricated by low temperature and high speed. Al-Si alloy engine bracket is suitable for low temperature pouring and high speed forming.