The utility model discloses a telescopic locating's gilled radiator flange interface measuring device, including gilled radiator, flange interface and locating plate, gilled radiator one side fixedlyconnected with flange interface, flange interface one side is fixed with the locating plate, the flexible measuring stick of locating plate one side fixedly connected with, flexible measuring stick one end fixed connection and fixing sleeve inner chamber, locating plate fixed surface has the locating lever, fixing sleeve fixed surface has switched on the jackscrew, flexible measuring stick fixed surface is provided with the scale strip. The utility model relates to a reasonable novel, its fixed mode and using -way are comparatively simple, can effectual improvement to gilled radiator both endsflange interface detect's precision, effectively avoided the work load of actually trying on clothes and joining in marriage with tape measuring's sum of errors, guaranteed that gilled radiator and transformer body need not try on clothes just to join in marriage can accurate judgement flange interface to cooperate whether to meet the requirements.