Insulating ladders are manufactured by the pultrusion process of polymerizing unsaturated resins and glass fibers. Epoxy resin combined with pin rod technology is selected for the materials. The surfaces of steel parts of the shaft are coated with protective layers. The processed surfaces of insulating laminated material components are treated with insulating paint. The anti-slip design of the ladder braces and feet makes it less likely to cause fatigue. All parts of the ladder have no sharp edges and corners, ensuring a high level of safety and strong insulating performance. It has low water absorption and is corrosion-resistant.