Carton sealing machine

The utility model provides a carton sealing machine which comprises a board taking mechanism, a board folding mechanism, a front folding mechanism, an upper pressing mechanism and a side face folding mechanism, the board folding mechanism is used for pre-folding the front portion and the rear portion of a paperboard to be in a vertical state, and the front folding mechanism is used for folding the front portion and the rear portion of the paperboard and comprises a first front folding assembly, a second front folding assembly and a glue spraying assembly. The first front folding assembly comprises a first push plate and a first driving assembly, the second front folding assembly comprises a second push plate and a second driving assembly, and the first driving assembly and the second driving assembly drive the first push plate and the second push plate to be matched with the glue spraying assembly to seal an upper opening of the paperboard. The first push plate and the second push plate are both rotationally