The invention discloses a fixing structure for an automobile diagnose interface plugin. The fixing structure comprises a box body, a diagnose interface plugin and a locking structure, wherein the boxbody comprises an opened accommodating cavity, the diagnose interface plugin is accommodated in the accommodating cavity in a sliding way, the locking structure comprises a fixing part and a locking part, the fixing part is arranged in the diagnose interface plugin, the locking part is arranged in the accommodating cavity, and the diagnose interface plugin is locked in the accommodating cavity when the diagnose interface plugin slides to a preset position. Compared with the prior art, the diagnose interface plugin is arranged and fixed in the box body, the box body and an electrical appliancebox body are integratedly designed, so that the fixing position of a diagnose interface is easy to be uniform, occupies small space and is difficult to affect by the vehicle structure and the arrangement space, and the technical problem that the fixing position of the diagnose interface plugin corresponding to a traditional structure is different and is difficult to seek is solved; and moreover, the diagnose interface plugin is safe and reliable to fix, and the fixing structure is convenient to use and has excellent protection effect.