The utility model discloses a detection device for an oil rig disc brake control system. The device is an electrical control box. A first control insertion and connection element XP1, a second control insertion and connection element XP2 and a power insertion and connection element XP3 are arranged on the side surface of the electrical control box separately. A normally open clamp indicating lamp IND1, a normal close clamp indicating lamp IND2, a working clamp indicating lamp A, an emergency brake indicating lamp SB11, a parking brake indicating lamp SB21, a mode conversion SA and a working brake indicating lamp JS2 are installed on the panel of the electrical control box. The device of the utility model can be used to realize two functions: 1) when the device is connected with a disc brake operating floor, the device can be used to detect whether the operating floor control system is normal; 2) and when the device is connected with a disc brake hydraulic pressure station, the device can be used to detect whether the disc brake system electro-hydraulic executive portion is normal.