Abstract: By melt blending of poly (butylene adipate-co-terephthalate) (PBAT) and styrene-glycidyl methacrylate (ADR), a series of biodegradable materials (PBAT/ADR) were prepared through a twin-screw extruder. The effects of ADR on the melt flow rate, carboxyl end group content, gel content, thermal properties, rheological properties and mechanical properties of PBAT at different blending temperatures were investigated. The results showed that the melt flow rate of the polymer PBAT/ADR decreased significantly with the increase of ADR content. When the mass ratio of ADR to PBAT was 1.8∶100, the melt flow rate met the industrial production requirements. In addition, with the increase of temperature, the terminal carboxyl content of PBAT/ADR decreased significantly, while the gel content increased significantly, which proved that the crosslinking reaction between PBAT and ADR occurred and the branched macromolecular structure was formed. With the increase of temperature, the crystallization temperature of PBAT/ADR decreased slightly, and the glass transition temperature and thermal decomposition temperature increased. The viscoelasticity of PBAT was significantly enhanced after the addition of ADR; the branched cross-linked structure was formed inside; the processing performance was changed. Compared with pure PBAT, the tensile strength of PBAT/ADR increased and the elongation at break increased significantly. The maximum tensile strength was 19.2 MPa and the elongation at break was 1036.3%.