The contact element is one of the main parts on the combined handle of the closed furnace calcium carbide furnace, divided into left and right contact element assemblies, the element is made of high-purity forged copper processing, due to its working environment with high temperature characteristics, its internal cooling with softened water. Each element consists of two parts, which are connected together by several sets of springs with adjusting bolts and clamped on both sides of the ribbed fins of the electrode shell, and through reasonable adjustment of the compression force, good contact is maintained so as to ensure stable current transmission.