The insulated soft bus bar is superimposed by a layer of highly flexible flat thin copper conductors, and the outer layer is extruded. The method is made of an insulating layer, and the insulating layer is currently made of special polyvinyl chloride(PVC) and Thermoplastic elastomeric (PVE) two materials. TPE has the characteristics of low smoker and halogen free. The insulate layer is black. Because the copper conductor can slide freely in the insulating layer, The insulating soft bus has infinite bending and torsion characteristics. At the same time, the multi-layer flat conductor structure of the insulated soft bus enables the same cross-sectional area of body to carry more current, thus reducing the conductance also reduces the weight and saves the layout space.