Steel door and window section bar insulated bridge

The utility model provides a heat-insulation bridge structure of a steel door window profile. Two cold roll formed steel profiles of the structure are shaped with openings; both ends of the steel profile are provided with notches; discontinuous and evenly distributed conical tables are preformed in the linear direction along the edge of each notch, and one side of the conical table is an arc-shaped surface. Two engineering plastic bonding panels are separated by an aluminum plate in the longitudinal direction and both ends of each engineering plastic bonding panel are respectively provided with a groove for slowing down resilience and a groove allied with the conical table. A clearance is left at the notch of the steel profile in advance for being fitted with connecting plate; in the process of compound forming, both ends of the connecting plate are respectively inserted into the notches of the steel profile; the main profile and the connecting plate are firmly occluded together under the action of a barrel roll of a compound machine, a vertical roller and a gradually-changed friction core strip.