An outleakage-prevention lengthened type open ton bag is characterized by comprising a bag body; the top of the bag body is in an open type; and suspending straps are arranged on the top of the bag body, and the bottom of the bag body is closed. A lengthening portion is connected to the top of the bag body. The outleakage-prevention lengthened type open ton bag has the beneficial effects that the bag body of the lengthened type open ton bag is in the open type, so that objects with the large size can be conveniently loaded, and the loading and unloading speed is improved; and the lengthening portion can effectively prevent materials from being leaked outwards.