Automobile pipeline trend detection device and detection method

The invention relates to an automobile pipeline trend detection device and a detection method. The device comprises a test bench, the test bench comprises a pedestal and a plurality of slide rail assemblies, the slide rail assemblies are distributed at intervals in the width direction of the pedestal, and each slide rail assembly comprises two first slide rails which are vertically arranged and are respectively arranged at the two sides of the pedestal in a sliding manner, a second slide rail horizontally arranged between the two first slide rails in a sliding manner, and a mounting block arranged on each second slide rail included in a part of all the second slide rails in a sliding manner, and a checking fixture arranged on each second slide rail included in the rest of the second slide rails in a sliding manner. The detection method comprises the following steps of determining the mounting positions of a non-detection part and a detection part of a pipeline on a test bench, moving the first slide rail, the