The invention relates to a microwave inductive anti-theft alarm for motorcycle, which is characterized by comprising a 12V DC power supply, a microwave inductive and detecting circuit, a monostable delay circuit and a buzzer driving circuit; the microwave inductive anti-theft alarm comprises a 12V DC power supply, a microwave inductive and detecting circuit and a buzzer driving circuit. In the microwave induction and detection circuit, the type of microwave induction controller IC1 is TX982. Most of the common alarm methods are triggered by the motorcycle triggered by slight vibration or touchcircuit to alarm. Its disadvantage is that in most cases, only people accidentally touched the motorcycle, and no substantial theft occurred, the motorcycle alarm rang loudly, innocent people are easily frightened. The invention discloses a motorcycle microwave induction type burglar alarm, which alarm is carried out through microwave induction mode, when someone is not far away from your motorcycle for a long time, the alarm sound is actively emitted, once the person is far away from the motorcycle burglar alarm for about ten seconds, the alarm will be stopped, and the situation of inadvertent touching and alarm will not occur again. The invention provides a motorcycle microwave induction type burglar alarm.