Vehicle-mounted plastic bag

The utility model discloses a vehicle-mounted plastic bag, relates to the technical field of vehicle-mounted plastic bags, and solves the problems that as the space on an existing motor vehicle is limited, particularly a small passenger car, is narrower, garbage generated by a passenger or a driver in the vehicle cannot be placed generally and is easy to throw out of a window, the space is occupied when a garbage can is placed, and the use is inconvenient. The utility model relates to a novel plastic bag, in particular to a novel plastic bag which solves the technical problems that the existing plastic bag is not convenient to use but not convenient to use when only a garbage bag is used, and comprises an outer ring body, an inner ring body and a plastic bag body, a groove is formed in the inner ring of the outer ring body, the groove is matched with the inner ring body, and the plastic bag body penetrates through the outer ring body and is arranged on the outer ring body in a sleeved mode. And the plastic ba