The invention discloses a maintenance-free disconnecting switch. The switch comprises a base, an insulation porcelain bottle column, a moving contact wiring base, a moving contact, a fixed contact, afixed contact wiring base and a transmission rod; the moving contact comprises a moving contact conductive arm and a moving main contact, the moving main contact comprises button contacts and a convex-type moving contact base, the moving contact conductive arm is composed of two groove-shaped arms which are front and back opposite, the moving contact base is arranged in the moving contact conductive arm, and the button contacts are symmetrically arranged on two edges of a raised head of the moving contact base; the fixed contact comprises a fixed contact conductive arm and a fixed main contact, the fixed main contact comprises an end fixed contact and a convex-type fixed contact base, the fixed contact conductive arm is composed of two groove-shaped arms which are front and back opposite,the fixed contact base is arranged in the fixed contact conductive arm, and the end fixed contact is arranged at the front end of a raised head of the fixed contact base; the moving contact conductivearm and the fixed contact conductive arm are connected with wiring ends through copper strips respectively. The maintenance-free disconnecting switch has the advantages of simple structure, reliableelectric conduction, small resistance, ultra-high oxidation resistance, corrosion resistance, smooth opening and clothing, flexibility, durability, difficult deformation and the like.