Hardcover book groove pressing and flattening device

The utility model relates to the technical field of hardcover books, in particular to a hardcover book groove pressing and flattening device which comprises a machine frame, a pneumatic flattening assembly and a pneumatic groove pressing assembly are fixedly connected to the left side and the right side of the inner side of the machine frame respectively, and the pneumatic groove pressing assembly comprises an upper groove pressing air cylinder, a lower groove pressing air cylinder and a lower book spine blocking air cylinder. The output end of the upper groove pressing air cylinder and the output end of the lower groove pressing air cylinder are fixedly connected with an upper tool apron and a lower tool apron respectively, an upper groove pressing tool and a lower groove pressing tool are fixedly connected with an inner cavity of the upper tool apron and an inner cavity of the lower tool apron respectively, the pneumatic flattening assembly comprises a flattening air cylinder, a front roller and a rear roll