A pet buckle includes a buckle body and a snap-fit member that can be inserted and fastened together, and a buckle cavity is disposed in the buckle body, the clip component is provided with an insertion section matched with the fastening cavity and is used for the belt adjusting portion of the webbing adjustment is characterized in that: a stretched extending piece is disposed on a bottom surface of the buckle body fastening cavity, and the extending piece extends to the card when the button body and the engaging member are fastened to each other. The strap adjustment portion of the connector presses the webbing of the strap adjustment portion.