The invention discloses a bagging and opening sealing device used on a bagging machine. The bagging and opening sealing device comprises two vertical columns which are arranged on a front-end rack of the bagging machine, wherein the two vertical columns are separately located at the two sides of a fork plate, a cross beam is arranged between the two vertical columns, the cross beam is driven by a driving mechanism to move up and down along the vertical columns, a rotating handle is arranged below the cross beam, the rotating handle is hinged to a shaft seat below the cross beam through a rotating shaft, guide grooves are arranged in the vertical columns in a vertical direction, the two ends of the rotating shaft separately extend out of the guide grooves, a rotating gear is arranged at the end part of one end of the rotating shaft in a sleeving manner, a first rack is arranged at the ends, close to the rack, of the vertical columns, and when the rotating gear moves downwards with the cross beam until is meshed with the first rack, the rotating handle rotates and turns with the rotating shaft so as to seal a bag opening. The bagging and opening sealing device used on the bagging machine is simple in structure, convenient to operate and great in opening sealing effect and can well protect fruitlets.