The invention discloses a bridge cable electromagnetic flaw detection device and application thereof, and relates to the field of bridge cable nondestructive testing. The bridge cable electromagnetic flaw detection device comprises a sleeve. A plurality of magnet exciting coils are fixed to the outer wall of the sleeve, a plurality of grooves are formed in the inner wall of the sleeve, and each groove is internally and fixedly provided with a detection coil for detecting leakage magnetic flux at a broken wire position. A bridge cable nondestructive testing system comprises the bridge cable electromagnetic flaw detection device, an insulated gate bipolar transistor connected with the magnet exciting coils, a power supplying device connected with the insulated gate bipolar transistor, and a computer connected with the insulated gate bipolar transistor. A signal processing device is used for receiving and processing flaw signals sent by all the detection coils and sending processed flaw signals to the computer. The bridge cable electromagnetic flaw detection device is large in detection area, low in weight and capable of detecting high-altitude bridge cables which are difficult to arrive for people. According to the bridge cable nondestructive testing system, the detection sensitivity can be adjusted, and the detection accuracy rate can be increased.