The invention provides a boot rail detecting system and a using method thereof. The system at least comprises a bracket module, a detecting carrier, a transmitting module, a mounting base, a running track and a detecting device. A contact rail is installed on the bracket module, the bracket module is installed on the mounting base, a sliding boot device is installed on the detecting carrier, kinetic energy is given to the detecting carrier through the transmitting module, the detecting carrier is displaced with a certain speed, and the displacement direction is parallel to the laying directionof a contact rail. The sliding boot device is in contact with the contact rail when the detecting carrier is in a stationary or moving state. When the system is used, a slider presses against the surface of the contact rail with a certain force, after the transmitting module releases the detecting carrier, the accumulated energy is converted into the kinetic energy of the detecting carrier, so the detecting carrier moves on a traveling track at a preset speed, at the same time, a data acquisition and storage device records a detection value of the detecting device, the detection object of thedetection device includes the sliding boot device and the contact rail, and the coupling condition of the boot and the rail is evaluated through subsequent data processing.