The invention discloses a resistance board reliability detector, and belongs to the technical field of electronic detection. The resistance board reliability detector mainly solves the problems that a manual brushing degree is difficult to control and resistance wire damage is difficult to discover. The resistance board reliability detector is characterized in that the resistance board reliability detector is composed of a precise steady current source, a time relay and a detection clamp. The detection clamp comprises a clamp seat, a fixed clamp body, a movable clamp body and a spring, the clamp seat is a base with a bar-shaped boss in the center, the fixed clamp body is fixedly connected on the boss of the base, the movable clamp body is fixed to the boss of the clamp base through a screw, two stand columns are arranged besides the fixed clamp body and the movable clamp body, and the spring is fixed on one stand column. The resistance board reliability detector has the advantages of being capable of screening resistance boards and guaranteeing the fact that the resistance boards of sensors mounted on vehicles meet reliability quality detection requirements, is mainly used for detecting the reliability of the resistance boards in resistance board production, and guarantees the fact that burnout of resistance wires can be avoided when electric current is enlarged and the vehicle is mounted.