A positive pressure breathing apparatus includes a cover, a micro pump, and a processor. The cover body fixes the user's face and corresponds to the airway opening to form a closed space. The micro pump is coupled to the cover body and communicates with the outside of the cover body, and the processor is electrically connected to the micro pump. When the processor transmits a start control signal to the micro pump, the micro pump is activated according to the start control signal, and the external air is transmitted into the closed space to form a positive pressure airflow to be injected into the respiratory channel of the user. A pressure detector is further disposed in the enclosed space to detect the pressure of the enclosed space, and the processor determines the breathing state of the user and adjusts the air pressure output of the micro pump.一種正壓呼吸裝置，包含一罩體、一微型泵浦以及一處理器。罩體固定使用者面部並對應呼吸道口以形成一封閉空間，微型泵浦結合於罩體並連通該罩體外部，處理器電性連接微型泵浦。當處理器傳送一啟動控制訊號至微型泵浦，微型泵浦根據該啟動控制訊號啟動，並將外部氣體傳輸至該封閉空間中，形成一正壓氣流灌入使用者的呼吸道口。封閉空間中更設有一壓力偵測器，以偵測封閉空間之壓力，供以處理器判斷使用者之呼吸狀態並據以調控微型泵浦之氣壓輸出。
