The invention discloses a wiring harness drying device which comprises a base plate and a cylinder. Heaters are evenly distributed on the inner wall of the cylinder, the cylinder is installed on the base plate, an annular groove is formed in the upper end face of the base plate, a rolling body is arranged in the annular groove, the upper portion of the rolling body is provided with a rotary disc,a cone table is arranged in the center of the rotary disc, a stand column is arranged in the center of the cone table and is evenly provided with supports, wire clamping devices are evenly distributedon the supports, and rotation of the rotary disc is driven by a servo motor; and a sliding groove is formed in the outer wall of the cylinder, a push-and-pull door is installed on the sliding groovein a sliding manner, the top of the cylinder is provided with a heat radiating fan which is driven by a heat radiating fan, and the base plate is further provided with a temperature sensor and a timer. By means of the wiring harness drying device, wiring harnesses are clamped by the wire clamping device to be placed on the supports, then the heaters are used for heating and humidity removal of thewiring harnesses, and the wiring harness drying device which is even in heating and controllable in temperature is provided.