The invention discloses a relay protecting concentrator. The relay protecting concentrator comprises a plurality of baffles, line concentration discs and test line clamping grooves. The baffles are vertically arranged at intervals, the line concentration discs are correspondingly arranged between every two adjacent baffles and control the storage of test lines, the test line clamping grooves are clamped in the bottoms of the baffles, the bottom of each baffle is provided with a groove, the grooves correspond to one another in the same direction, the test line clamping grooves are correspondingly formed inside the grooves, and the center of the surface of one side of each line concentration disc is provided with a connecting point. According to the relay protecting concentrator, various test lines can be integrated and can be collected automatically after verification.