Abstract: A vehicle power monitoring and auxiliary starting device is provided. The device includes a case, a supercapacitor module, a first circuit, and a second circuit. The at least one supercapacitor module is connected in series through the first circuit, the second circuit includes a balanced charging and controlling circuit, a display module, a relay control circuit and a boost circuit. The first circuit has a positive pole and a negative pole connected with the vehicle battery's positive pole and negative pole. The power of the vehicle battery maintains a certain amount of reserve power, and the balanced charging and controlling circuit of the second circuit monitor the vehicle battery.