Steel-plastic composite pipe

The utility model relates to the technical field of plastic pipes, in particular to a steel-plastic composite pipe which comprises an inner-layer pipe, a steel belt layer, an outer-layer pipe, an adhesive layer and a bonding layer, and the inner-layer pipe, the steel belt layer and the outer-layer pipe are bonded through adhesive. And the inner layer is PP-R added with ceramic fibers, so that the pipe is endowed with good high-temperature resistance and impact resistance. The aluminum-plated steel strip layer has the strength of steel and the heat resistance of aluminum, and also has the flexibility and strength of the pipe. And the outer layer is PE-RT of which the outer surface is coated with a polytetrafluoroethylene coating, so that the thermal insulation performance and the corrosion resistance of the pipeline are improved. According to the port combining layer, the inner-layer pipe and the outer-layer pipe are stitched together in a staggered mode through plant fibers, so that the steel belt layer at th