The invention provides a cable on-off testing system, which includes a housing, an ear plate, a wire placement frame structure, a support rod, a moving wheel, a tool placement frame structure, a positioning hole, a workbench, a work protection frame structure, a multimeter, test pens, and wires. The end fixing frame structure, the baffle plate, the wire support frame and the arc groove, the ear plates are respectively welded on the left and right sides of the upper part of the front end of the shell; the wire placement frame structure is installed on the inner lower part of the ear plate; The supporting rods are respectively arranged on the left and right sides of the wire placement frame structure. The beneficial effects of the present invention are: through the setting of the mounting plate, the support column and the U-shaped frame, the redundant wires are placed on the upper part of the mounting plate or wound on the inner side of the U-shaped frame, which is conducive to conveniently winding the redundant part of the wires on the U-shaped frame. The inner side of the type frame is convenient for the staff to detect the longer wires and increase the use function of the equipment.