Bag taking machine capable of automatically replacing bags

The invention relates to an automatic bag changing bag taking machine which comprises a cabinet body, a screen housing, a display screen, an external bag outlet, a cabinet door, a storage groove, a bag outlet device and a bag barrel replacing device, the screen housing and the cabinet door are installed on the cabinet body, the display screen is arranged on the screen housing, the external bag outlet is formed in the lower side of the display screen, and the bag barrel replacing device is arranged in the storage groove. A storage groove is fixedly formed in the cabinet door, a groove opening in the storage groove corresponds to the external bag outlet, the bag barrel replacing device is arranged in the bag barrel replacing device, a plurality of standby bag barrels can be stored at the same time, the used bag barrels can be automatically replaced, the follow-up manual bag barrel replacing frequency is reduced, the follow-up maintenance cost is reduced, and the bag barrel replacing efficiency is improved. Acco