Silicon carbide particle reinforced aluminum matrix composites play an important role in aviation, aerospace, electronics, automobile, and other fields due to its excellent mechanical properties. In order to improve its cutting performance, the liquid nitrogen spray experimental device was used to carry out milling experiments. The cutting force, surface integrity, and chip morphology were studied to explore the machining quality of TiAlN coating and TiAlSiN coating milling cutter under normal and low temperature conditions. The results show that when milling at low temperature, the cutting force of the two tools increases, and the surface defects such as aluminum matrix cracking and spalling are significantly improved, and the machined surface damage and roughness are reduced. Low temperature milling can obtain better surface quality. In addition, the cutting force of TiAlSiN coated milling cutters is lower than that of TiAlN coated milling cutters under normal temperature and low temperature. The surface integrity and chip morphology of TiAlSiN coated milling cutters are better than those of TiAlN coated milling cutters under low temperature conditions.