The invention discloses a noise vibration testing device for a portable transformer, and the device comprises a noise sensor, a vibration sensor, a signal collection card, and an industrial tablet PC. The noise sensor and the vibration sensor enable the collected signals to be transmitted to the industrial tablet PC through the signal collection card. The industrial tablet PC is sleeved by a protection housing, and the protection housing is connected with a brace. The vibration sensor is disposed on a wall of an oil tank of the transformer, and the noise sensor is disposed on a microphone support. The highest part of the microphone support is located at a position on the oil tank of the transformer, wherein the position is at 1/4-2/3 of the height of the oil tank. The distance from the noise sensor to the reference transmitting plane of the transformer is from 0.2 m to 2.5 m. The device is portable, and can accurately measure the noise and vibration data of the transformer.