Paint film lineation detection apparatus and detection method thereof

The invention discloses a paint film lineation detection apparatus and a detection method thereof, which relate to the technical field of a paint film detection tool. The paint film lineation detection apparatus comprises power supply, an alarm and a lineation cutter, one end of a lead is contacted with a cutting port metal of a to-be-detected aluminium alloy wheel, the other end of the lead is connected with the power supply, the alarm, and the lineation cutter in order, and a semiclosed loop circuit; a free end of the lead is connected with the cutting port metal of the to-be-detected aluminium alloy wheel while detecting, the lineation cutter is used for performing lineation on a surface of the paint film of the to-be-detected aluminium alloy wheel, when the lineation cutter is contacted with a metal substrate of the to-be-detected aluminium alloy wheel, the above semiclosed loop circuit is communicated, and a closed loop is formed, a buzzer and a light emitting diode operate, and the lineation cutter is c