The invention relates to a method for steel wire strengthened composite plastic tube, wherein it comprises: continuously extruding the polymer core tube; feeding it into steel wire coiler or steel wire weaver, to coil or weave at least one layer of steel wire strengthened element and composite polymer layer, at left rotation direction and right rotation direction; and it is characterized in that: it uses the high-frequency heater, between the steel wire coiler or weaver and the polymer composite device or between the coiler and the weaver, to heat the coiled or weaved steel wire strengthened element. The invention has better heating effect, without deforming the core tube; and the core tube can be thin, to reduce the cost. And the invention also provides a relative device. |