Air suction and exhaust power device capable of automatically controlling flow

The utility model provides an air suction and exhaust power device capable of automatically controlling flow, which comprises a driving motor, a pressure generating unit, an air inlet channel and an air exhaust channel, and the air inlet channel and the air exhaust channel are communicated with the pressure generating unit. A first pressure sensor and a second pressure sensor are installed on the portions, located on the upstream and downstream of the throttling structure, of the air inlet channel correspondingly. A third pressure sensor and a fourth pressure sensor are installed on the portions, located on the upstream and downstream of the throttling structure, of the exhaust channel correspondingly. And the control circuit board is electrically connected with the first pressure sensor, the second pressure sensor, the third pressure sensor and the fourth pressure sensor and the driving motor. The flow detection sensor and the control circuit board are integrated in the exhaust power device, the compactness