The invention discloses a method and equipment which can quickly check the safety of a liquid article by dual-energy CT imaging. The method comprises the steps: firstly, a CT scanning and dual-energy re-building method is used for obtaining one layer or a plurality of layers of CT images containing the physical property of liquid to be checked; subsequently, by an imaging processing and analysis method, the physical property value of each piece of liquid to be checked is obtained from the CT images; and finally, the obtained physical property value is compared with the reference physical property value of the liquid article so as to judge whether drugs are hidden in the liquid article or not; wherein, the CT scanning method can be realized by the normal default CT scanning technique and aspiral CT scanning technique; when the normal default CT scanning technique is used, a series of specific positions can be arranged to carry out the scanning operation; alternatively, the scanning position can be appointed by an operator in virtue of DR images; and alternatively, the automatic analysis of DR images can be used for determining the position of the liquid part, thus guiding CT scanning.