Grouping device of beverage packaging line and bottle sorting method of grouping device

The invention discloses a grouping device of a beverage packaging line and a bottle dividing method of the grouping device, and aims to provide a bottle dividing device which can divide and pack quantitative products from a product flow, is not limited in product shape, does not need to be provided with a complex adjusting mechanism adapting to product size changes, and cannot be easily separated due to product position deviation. The grouping device of the beverage packaging line and the bottle dividing method of the grouping device of the beverage packaging line solve the problem that bottle dividing fingers cannot be accurately inserted into gaps among products and jack up the products. The grouping device of the beverage packaging line comprises a reciprocating motion conveying mechanism, the reciprocating motion conveying mechanism comprises a grouping belt, the discharging end of the grouping belt is provided with a notch extending in the direction of the feeding end, and the notch forms an output openi