Window opening type paper-plastic packaging bag

The utility model discloses a windowing type paper-plastic packaging bag which comprises an outer package, an observation mechanism is arranged on the side wall of the outer package, the observation mechanism comprises a transparent plate involved in the side wall of the outer package, two vertical plates are fixedly connected to the side wall of the outer package, the opposite side walls of the two vertical plates are jointly and rotationally connected with a rotating rod, and the rotating rod is fixedly connected with the transparent plate. A window shade and a rope are wound on the side wall of the rotating rod, and a pull ring is fixedly connected to the side wall of the rope. According to the beverage packaging bag, outside moisture and oxygen can be prevented from entering the packaging bag, beverage in the packaging bag is prevented from being in contact with the oxygen for a long time and going bad, safety of customers is guaranteed, and people can conveniently see the condition of the beverage in the