The method of manual detection is also very laborious, and it is also necessary to open the passenger's bag, which is very cumbersome, and the information detecting device of the X-ray security inspection machine can penetrate the article and can effectively detect the distribution of the article, X-ray. The security inspection machine is capable of penetrating particles. It is this characteristic that determines its powerful detection function. Of course, the penetration of the X-ray security inspection machine is much stronger than we think. Of course, it is generally used at a lower level. The radiation of energy avoids harm to the human body. Through the above introduction, I believe that everyone understands the working principle of the X-ray security inspection machine and should use the equipment reasonably.