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3D fabric reinforced C_f/Al composites were fabricated by the vacuum assisted pressure infiltration method. The microstructure and interfacial reaction of the composites prepared at different temperature levels was investigated. The uniaxial tensile property of the composites was tested at room temperature and elevated temperature and the corresponding tensile fracture surface was analyzed. The results indicated that the relative density increased and the fiber segregation in partial region decreased with fabrication temperature increasing. Meanwhile the content of Al₄C₃ compound at interface increased obviously. At room temperature, the ultimate tensile strength of the composites from 570℃ to 600℃ degenerated dramatically with interfacial reaction aggravated. When the composites were tested at elevated temperature, however, the ultimate tensile strength increased with fabrication temperature increasing. The improvement of interfacial strength is beneficial to the high temperature mechanical property. The matrix alloy softening and interface weakening due to elevated temperature can promote the fiber pull out and interface sliding during the fracture process.