The utility model relates to the technical field of notebook buckles, in particular to a notebook page turning buckle which comprises a connecting base connected to a shell of a notebook body, a marking piece used for separating a plurality of pieces of paper of the notebook body is arranged at the end, close to the notebook body, of the connecting base in a sliding mode, and an extension block is elastically connected into the connecting base. A clamping piece rotationally connected to the extension block is arranged at the end, away from the connecting base, of the extension block, a positioning rod is arranged at the end, close to the extension block, of the clamping piece, the end, close to the extension block, of the positioning rod penetrates into the extension block, and the positioning rod is rotationally connected to the extension block. Therefore, after the notebook is used, pages used last time can be marked, a user does not need to rummage the pages manually, the notebook is convenient to carry, and other files clamped in the notebook can be effectively prevented from being scattered.