Detection device and method for heat-resistant practical electric wire and cable

The invention belongs to the technical field of cable detection, and particularly relates to a heat-resistant practical electric wire and cable detection device which comprises a test box and an electric wire and cable to be detected, a static rotating shaft is fixedly installed on the inner wall of the test box, a fixed guide roller set is rotatably installed on the static rotating shaft, and a movable rotating shaft is slidably installed in the test box. A movable guide roller group is rotationally mounted on the movable rotating shaft, and four igniters which are arranged at equal intervals are mounted on the inner bottom wall of the test box. According to the invention, the pressing devices press the switches of the igniters at the same time, the igniters ignite the to-be-tested wires and cables, the igniters do not need to be started manually, the working efficiency is improved, the to-be-tested wires and cables are extinguished after being ignited for a specified time length, if the cables are burnt in