The invention relates to an installation method for optical fiber temperature measurement probes in a preset conduit transformer. The method comprises the following steps: selecting insulating conduits which are equal to the optical fiber temperature measurement probes in number, and marking each insulating conduit; carrying out winding of transformer windings, inserting a wedge insulating cushion block into a hotspot position, and laying and fixing the insulating conduits along a winding stay; laying the insulating conduits upwards along a fiber container, and fixing the insulating conduits on a wire clamp by a heat shrinkable tape; marking internal extension optical fibers in the optical fiber temperature measurement probes for distinguishing after drying the body of the transformer, and then inserting the optical fiber temperature measurement probes from the corresponding insulating conduits on the wire clamp. According to the installation method, installation of the optical fiber temperature measurement probes is carried out in a preset conduit manner, so that the post-installation time can be saved; the installation method is convenient and practical; and the work efficiency is greatly improved.