Multifunctional monitoring and controlling alarm of vacuum pump

The utility model relates to a multifunctional monitoring and controlling alarm of a vacuum pump. A vacuum pump in the current market is not provided with a negative pressure monitoring device, and cannot detect the reason for negative pressure abnormality so that it is difficult to prevent and exclude faults occurring in the processing process. The multifunctional monitoring and controlling alarm is provided with a three-phase default phase detection part, a moisture detection part, a vacuum degree detection part, a standby power supply, a signal processing circuit, an alarm whistle, an LED display, an alternating current input part and an emergency stop input part. When the situations that a phase of a three-phase power supply is lost, a negative pressure passageway is insufficient in sealing and the compressed air has too much moisture occur, the alarm whistle of the alarm gives out relevant alarms, and displays the alarms through the LED display, operating personnel stop processing immediately after heari