The utility model relates to a be used for transformer top layer oil temperature measuring test device, including insulation support, base and glass-stem thermometer, this insulation support describes main part, rood beam and landing leg by the ring and constitutes, installation rood beam in the ring form main part, and the rood beam is the vertical installation glass-stem thermometer in lower bottom surface at center alternately, four vertical landing legs of lower bottom surface equipartition installation of ring form main part, but the mode cartridge that the lower extreme of every landing leg all adopted height-adjusting is in a base. The utility model relates to an easy dismounting, low cost, repeatedly usable's be used for transformer top layer oil temperature measuring test device uses this device can shorten the measuring early-stage preparations of top layer oil temperature with the post processing time, effectively avoid contact, improvement test efficiency and the accuracy of glass-stem thermometer and transformer ware body. The utility model is suitable for an experimental top layer oil temperature of the oily formula distribution transformer selective examination of different models is measured.