A portable movable discharge processing system by short electric arc, including a power supply cooling water tank, a short electric arc cutting power supply, a ring current device a feeding mechanism, a hanging bracket and a pneumatic ring current tool mounted on the hanging bracket, which are successively and cooperatively mounted on a horizontal plane; an air compressor and a sewage pump, which are successively connected to the feeding mechanism; a self-priming pump and a movable short-electric arc cutting device control cabinet, which are successively connected to the air compressor; an anode device which is connected to the movable short-electric arc cutting device control cabinet through an anode cable; a cathode device which is connected to the movable short-electric arc cutting device control cabinet through a cathode cable; and a water pump which is connected to the anode device through a pipeline.