Three-layer insulated wire with low tin soldering melting loss

The utility model provides a three-layer insulated wire with low tin soldering melting loss, and belongs to the technical field of insulated wires. Comprising a base, a fixing seat is installed at the top end of the base, a circular hollow groove is longitudinally formed in the center of the interior of the fixing seat in a penetrating mode, a circular sliding groove is formed in the inner wall of the circular hollow groove, an insulated wire body is arranged in the circular hollow groove, and inserting blocks are installed on the outer wall of the insulated wire body in an array mode; sliding plates are slidably installed in the circular sliding groove in an array mode, the ends, away from the circular sliding groove, of the sliding plates penetrate out of the circular sliding groove, inserting grooves are formed in the sliding plates in a longitudinal penetrating mode, and the inserting blocks are inserted into the inserting grooves. According to the utility model, the twisting force applied to the insulate