The invention relates to a device realizing the track-traffic direct-current feeding protection, the invention is characterized in that the device consists of an embedding-typed system, a switch controlling module, an A/D conversion module, an I/V conversion module and a collection input port, wherein, the embedding-typed system is respectively connected with the switch controlling module and the A/D conversion module, and the A/D conversion module is connected with the collection input port through the I/V conversion module. The device performs the detection and the judgment on the independent protection of the over-current instant protection, the over-current time-delay protection, the thermal inverse-time-lag protection, the near short-circuit protection and the far short-circuit protection, and can record the waveform data 300 ms before and 200 ms after the action while triggering the protection, thereby rapidly and correctly removing the malfunctions when the short circuit and the overloading are happened on the train contact line of a direct-current pulling network-circuit feeding system and preventing the mistake tripping operation of the protection device, which is caused by the variation of electric parameters while the train is in normal operation through the setting adjustment.