The utility model discloses an insulating socket-and-spigot joint for pipelines, which is characterized in that the surfaces of the socket-and-spigot joint (refers to an inside surface, an outside surface and a joint of the inside surface and the outside surface) are respectively provided with a solvent-free polymer alloy modified epoxy insulating coating (13). According to then insulating socket-and-spigot joint for pipelines specially provided by the utility model, the socket-and-spigot joint is human-friendly in structural design, easy to operate and portable; the insulating socket-and-spigot joint overcomes the defect of the traditional buried socket-and-spigot joint for pipelines that the long-term electrical insulation strength is unstable because of the adoption of an epoxy laminated board, and has the advantages of high compressive strength and good long-term low-water-absorbability and water vapor permeation resistance and the like; and the insulating socket-and-spigot joint is simple in production process and low in production cost, and has great economic and social values.