Automobile frame automatic assembly detection system and detection method

The invention relates to the technical field of automobile detection tools, in particular to an automatic assembly detection system and method for an automobile frame, and the system comprises a rack, a fixing device, a detection device, and a supporting structure. A supporting slide rail is mounted on the rack; the fixing device comprises a first linear driving assembly, a first supporting assembly and a flexible clamping jaw. The first linear driving assembly comprises a sliding installation base and a first linear driver, the sliding installation base is installed on the supporting sliding rail in a sliding mode, and the first linear driver is fixedly installed on the sliding installation base; the first supporting assembly comprises a supporting frame and a first connecting rod, the driving end of the first linear driver is in transmission connection with the supporting frame, and one end of the first connecting rod is hinged to the supporting frame; and the other end of the first connecting rod is hinged