Temperature measuring element specially used for cracking furnace COT

The utility model relates to a temperature measuring element specially used for a cracking furnace COT, which comprises a measurement end protecting body, a process flange, an outer protection sleeve, an inner protection sleeve, a running knot, a junction box, a blocking sleeve bolt, a round joint and an armored temperature measuring element, wherein the junction box is connected with the process flange by the running knot; the upper part of the outer protection sleeve is connected with the flange, and the lower part of the outer protection sleeve is connected with the measurement end protecting body; and a paraboloid shape is adopted by an anti-scouring surface of the measurement end protecting body. The temperature measuring element specially used for the cracking furnace COT is high in measurement accuracy, long in service life and convenient in replacement.