The invention relates to an ultrasonic wave induction-type automobile anti-theft device, which comprises an automobile anti-theft
host machine, at least one ultrasonic
detector electrically connected with the automobile anti-theft
host machine and at least one warning device electrically connected with the
host machine. When a driver and passengers leave the automobile and start the device, then all the ultrasonic detectors respectively perform scanning to the reflected values of the ultrasonic
waves in the positions corresponding to the ultrasonic detectors and preserve the reflected values in the host
machine, if a person enters into the automobile or the glass of the automobile is broken, the change of the reflected values of the ultrasonic
waves in the corresponding positions is caused respectively, the host
machine responds to drive the warning device to send out warning after receiving the abnormal
signal, and the warning device is provided with a high-
decibel alarming horn and a
GSM or CDMA mobile
communication device which can be connected to the telephone of a vehicle owner. The invention also comprises a
wireless remote controller used for controlling the starting and closing of the anti-theft function of the anti-theft device. By adopting the ultrasonic wave induction-type automobile anti-theft device with the structure, the
false alarm phenomenon cannot occur, and the remote alarm can be realized.