The present invention provides a vehicle with the automatic detection function of a transparent barrier and a work method thereof. The vehicle uses a transparency detection device, and the transparency detection device comprises a light source configured to emit detection light, a detector configured to convert the reflection light of the received detection light passing through the air on a target object to first electric signals and send the first electric signals to an analysis module, the analysis module configured to remove the signals with the same features as the signal of the detection light to obtain difference signals and know whether the target object is the transparency or not according to the difference signals. The precision is high, the structure is simple, and the cost is low, etc.