ZrO₂ ceramic and GH3536 alloy were successfully reactive air brazed (RAB) at 1050℃ for 30min with Ag-CuO-Al₂TiO₅ composite filler. The interface structure and formation mechanism of the brazing joint were analyzed. Meanwhile, the influence of the exposure test at 800 ℃ on the microstructure and properties of joints were systematically analyzed. The results showed that Al₂TiO₅ particles were decomposed into Al₂O₃ and TiO₂ particles, and TiO₂ reacted with ZrO₂ ceramic to form the ZrTiO₄ phase. The oxidation reaction occurred on the metal elements from GH3536, which reacted with Al₂O₃ and CuO in the brazing seam respectively to generate NiAl₂O₄ phase with fine distribution in the brazing seam and massive NiCuO₂ phase adjacent to the spinel layer. After the ZrO₂/GH3536 joint was oxidized above 1000 h at 800 ℃, NiAl₂O₄ in the brazing joint was distributed in blocks and while the thin layer of Cr₂O₃ remained stable. The elements inside the spinel layer were homogenized, the thickness of which increased significantly. The strength of the joint first decreased and then stabilized at 20 MPa with the extension of oxidation time.