Temperature detection device and transformer

The invention relates to a temperature detection device and a transformer, the temperature detection device comprises a first box body, a sliding assembly, a bearing plate and a temperature sensor, the first box body is provided with a first accommodating groove, and the first accommodating groove is provided with a first opening; the sliding assembly is arranged in the first containing groove and comprises a sliding rod, a sliding block and a sliding plate, the sliding rod extends in the first direction, the sliding block is slidably connected with the sliding rod, the sliding plate is connected with the sliding block, and the first direction is perpendicular to the plane where the first opening is located; the bearing plate is arranged on one side of the first box body and covers the first opening, the bearing plate is connected with the sliding plate, and the bearing plate is detachably connected with the first box body; the temperature sensor is arranged in the first containing groove and connected with t