The invention relates to the technical field of big bag packaging, in particular to a ton bag packaging machine. The ton bag packaging machine comprises ground rails, a trolley arranged on the ground rails and a wagon balance installed on the trolley, and the trolley is further provided with an outer support frame with a packaging bag. According to the ton bag packaging machine, a ton bag is opened through inflation of an air pump, the ton bag can keep the certain standing property after being opened, and the opened ton bag can be temporarily fixed under the action of the outer support frame; when loading is conducted through the ton bag, the air pump is powered off, and then dust flying is avoided.