Abstract: Being one of the important measures to produce non-polluted fruit, the fruit bagging technology can improve fruit quality and avoid pesticide and injurant to pollute the fruit. The manual fruit bagging operation has strong labor intensity and serious danger. According to the steps of manual operation, the automatic bagging technology is divided into two stages performing by two mechanisms: the automatic unfolding-opening mechanism and the automatic bagging mechanism. The automatic unfolding-opening mechanism was designed. This mechanism includes the bag separating part, the unfolding-opening part and the transporting part. Driven by the aerodynamic force, the piled fruit bags were separated one by one by using two blocks and a couple of vacuum sucking pans, enlarged inside maximally through an arc fingers, then were transported in other place to wait for bagging. The mechanism is controlled by 51-series single-chip microcomputer, and can carry out three bags per minute.