Noise-reduction and sound-insulation ventilation door of transformer of fabricated transformer substation

The invention discloses a noise-reduction and sound-insulation ventilation door of a transformer of a fabricated transformer substation, and belongs to the technical field of transformer noise reduction. The noise-reduction and sound-insulation ventilation door aims to solve the problems of sound insulation and noise disturbing of a transformer gate and meanwhile solve the problem of safe use of atransformer in high-temperature seasons. According to the technical scheme, the noise-reduction and sound-insulation ventilation door of the transformer of the fabricated transformer substation comprises a main body, a variable frequency motor and at least one set of air changing device, the main body is sequentially provided with a first sound insulation layer, a second sound insulation layer and a third sound insulation layer from inside to outside, and the first sound insulation layer comprises an inner steel plate, an inner damping plate and a cavity which are formed from inside to outside; and the second sound i