The successful joining of carbon fiber-reinforced aluminum matrix(Cf/Al)composites and TC4 alloy can produce composite structure and meet the demands of lightweight in aerospace field.Up to now,few experi-mental researches have been reported on the joining of Cf/Al composites and TC4 alloy.In this study,the AgCu foils and Ni-Al-Zr compact were designed for the self-propa-gating high-temperature synthesis joining of these two materials.Cf/Al composites were joined with a reactive Ti plated on its joining surface.The typical microstructure of TC4/(AgCu/Ni-Al-Zr/AgCu)/Ti/Cf/Al joint was analyzed,and the effects of joining condition on microstructural evolution of the SHS joint were investigated.A thin reaction layer of Ni-Al-Ti intermetallic compounds was formed adjacent to the TC4 alloy.As a result,AgCu foils could reduce the effect of reaction heat on the substrates and improve the joint shear strength.When the thickness of AgCu foils reaches 150 μm,the Ni-Al-Zr interlayer mainly acts as auxiliary heat source.High joining pressure caused the active elements to diffuse into Cf/Al composites and weakened the shear strength of the joint.Finally,the joint shear strength could reach 36.4 MPa when the AgCu foils were 50 μm and the joining pressure was 2 MPa.