The invention discloses a battery pack pressure monitoring system using the Nbiot technology. The battery pack pressure monitoring system comprises a portable power supply shell which is internally provided with a charging battery pack module. The portable power supply shell is U-shaped and the vertical distance between the two internal side walls is 18-30cm. The portable power supply shell is also internally provided with a voltage detection module, an MCU control chip and a U-shaped supporting frame. The external side of the portable power supply shell is also provided with a magnetic sucking disc. The surface of one side of the magnetic sucking disc and the U-shaped supporting frame are fixed. The portable power supply shell is also provided with a USB interface module, a communicationinterface module, a buzzer alerter and a charging switch. The voltage detection module is connected with the charging battery pack module. The voltage detection module, the USB interface module, the communication interface module, the charging switch, the charging battery pack module and the buzzer alerter are connected with the MCU control chip.