The utility model provides a temperature measuring device of strong etchant solution medium of high temperature, relate to one kind be applicable to that the wet process is smelted and the chemical industry in high temperature, strong corrosive medium temperature parameters's measuring device. Its structure includes a triumphant dress thermal resistance, its characterized in that spacer sleeve outside triumphant dress thermal resistance is equipped with end confined metal sleeve, is equipped with the outward flange on the upper portion of metal sleeve, has coated the ceramic layer on the outer wall surface of metal sleeve. The utility model discloses a temperature measuring device of strong etchant solution medium of high temperature, metal protection pipe or the anticorrosive coating of effectively having overcome temperature element are often bad by the corruption, lead to the fact the thermal resistance frequently to damage the phenomenon, have improved temperature element's life effectively, can guarantee to be surveyed simultaneously the rate of accuracy and the coefficient of stabilization of temperature spot.