The utility model relates to an insulating joint on a continuous welded rail of a railway. The joint comprises insulating fishplates which are arranged between rail webs on the two sides of a rail and are fixed on the two sides of the rail webs by a bolt and a nut. The joint is characterized in that the insulating fishplates are formed by combination of splints, insulating layer plates and protective plates; and the insulating layer plates are formed by superposing four layers of PK4080 epoxy films and three layers of non-alkali fiberglass cloths at intervals. The insulating joint has the following beneficial effects: the following technical problems are mainly solved: a few insulating fishplates in the existing adhesive insulating joints are fractured after longer-time service, and more filling materials are needed as the gaps between the insulating fishplates and the rail webs are excessive; and the product quality is improved and the service life is prolonged.