The invention relates to a fixing method for a fluorescent temperature measurement sensor in a transformer, and belongs to the technical field of a power transformer. The mixing method disclosed by the technical scheme comprises the steps of firstly, processing different insulation standard pieces according to different winding types; secondly, selecting a fixing mode according to the fluorescenttemperature measurement sensor, fixing the sensor on an insulation standard pieces, respectively pasting insulation plates with thicknesses being 1 millimeter on an upper part and a lower part of eachinsulation standard piece; and pressing the insulation plates; and finally, determining installation time of a combination body of an insulation cardboard with the fluorescent temperature measurementsensor and a standard insulation piece according to different winding types. The fixing method has the effects that the fluorescent temperature measurement sensor is enabled to be reliably fixed, thedamage to the fluorescent temperature measurement sensor during the whole production process of the transformer is prevented, the fluorescent temperature measurement sensor is effectively protected,the installation success rate of the fluorescent temperature measurement sensor on a transformer winding is improved, the defect that an optical fiber of an original fixing mode is easy to damage is overcome, and the installation success of the fluorescent temperature measurement sensor on the transformer winding is improved.