The invention discloses a high-strength corrosion-resistant glass-lined reactor, which comprises a jacket, a tank body, a stirrer, an upper head, a lower head, a sight glass manhole, a thermometer nozzle, a feed port, and a discharge port, wherein the jacket is arranged at the outer side of the tank body, and a plurality of mounting and positioning devices are arranged outside the jacket at equal angles; a steam inlet is formed in the upper part of the jacket, and a vent port is formed in one side of the steam inlet; a condensate water outlet is formed in the bottom of the jacket, and a high-necked flange is welded on the feed port; a high-necked flange is welded on the sight glass manhole, and a high-necked flange is welded on the thermometer nozzle; a high-necked flange is welded on the discharge port, a bottom glaze layer is arranged on the inner side wall of the tank body, and a surface glaze layer is arranged on the bottom glaze layer; bottom glaze layers are arranged on the inner side walls, end surfaces and grooves of the high-necked flanges, and surface glaze layers are arranged on the bottom glaze layers. The high-necked flanges are added for welding of openings, so that the number of punch forming opening R parts is decreased, the effective thickness of equipment is directly increased, the compressive strength is relatively improved, and the safe operation of the equipment is ensured.