The utility model discloses a device for producing thermoplastic resin-coated insulating reinforcing steels, which comprises a reinforcing steel preprocessing part, a reinforcing steel coating part, a reinforcing steel post-processing part and a reinforcing steel conveying device, wherein the reinforcing steel preprocessing part comprises a refinishing machine, a sand blaster, a cyclone dust separator and a heater; the reinforcing steel coating part comprises a co-extrusion coating distributing die head, an adhesive extruder, a thermoplastic resin extruder and an extrusion moulding machine; the reinforcing steel post-processing part comprises a spray cooling box, a coating layer leak detector and a binding machine; and the reinforcing steel conveying device adopts a roller-type or crawler-type conveying production line. Insulating reinforcing steels produced by the device have strong holding power on base materials and achieve strong environmental suitability and good insulating property, are suitable for occasions needing the insulating reinforcing steels, are particularly suitable for mesh reinforcements embedded in a track slab or a track bed slab in a ballastless track, and can completely satisfy the insulating requirement of a track circuit of the ballastless track.