Abstract: Raman distributed temperature sensing (RDTS) systems play an important role in calibrating the temperature in the localized temperature variation region (TVR) of large structures. Currently, the spatial resolution of conventional RDTS systems is on the order of meters, which limits the accurate temperature measurement of TVRs on the order of centimeters. To solve this problem, we propose the Raman intensity information of the temperature rise profile to realize high spatial resolution temperature sensing. Firstly, we elaborate that the luminous fluxes at different positions within the pulsed light have different linearity when sensing temperature, and dynamically obtain the Raman intensity of the temperature rise curve by equating the calculated TVR lengths to the luminous fluxes at different lengths within the pulsed light. The experimental results show that the method can well realize the temperature sensing of TVRs with a length of 30 cm and a temperature error of ±3℃. Compared with the maximum Raman intensity of the temperature rise curve, the proposed method can overcome the temperature fluctuation caused by different heating zone positions within the sampling spacing. The scheme can realize the software upgrade of the temperature demodulation algorithm on the RDTS system, which greatly contributes to the application value of the RDTS system in the field of high spatial resolution temperature detection.