The utility model discloses a concatenation type heatable high accuracy distributed optical fiber temperature sensor contains bottom part, top part and a plurality of middle sections part, and each part all includes optic fibre, metallic conductor, heating wire, insulating waterproof plastic layer. The utility model discloses an each part passes through threaded connection, and optic fibre evenly twines on metallic conductor, and the heating wire runs through whole equipment part, and the optic fibre between each part and the connection of wire connect with E2000 respectively and the offering connector is connected, finally form concatenation type heatable high accuracy distributed optical fiber temperature sensor. The beneficial effects of the utility model are that adopt the industrial production, spatial resolution is high, can heat the temperature gradient of improvement sensor and medium, and engineering installation convenient and fast helps run duration maintenance management and sensor to change, can realize that the distributing type of temperature is measured and because the fluid monitoring of leakage of temperature spike principle.