Distributed optical fiber temperature measuring device and distributed optical fiber temperature measuring method

The invention discloses a distributed optical fiber temperature measurement method, which comprises the steps of arranging a detection optical fiber between an incidence point of an optical pulse and a farthest to-be-measured position, and selecting underlying surfaces of different environment media between the incidence point and the farthest to-be-measured position and sites perpendicular to the underlying surfaces as actual to-be-measured positions; selecting any site between the incidence point and the farthest to-be-detected position on the detection optical fiber as a reference position, and detecting the temperature of the reference position by using a temperature detector arranged at the reference position; determining the relative distance between the actual position to be measured and the incidence point; detecting the light intensity ratio of the anti-Stokes light to the Stokes light at the reference position, and detecting the light intensity ratio of the anti-Stokes light to the Stokes light at t