On-site fault diagnosis of laminating machine is often carried out under very incomplete conditions and very urgent situations. It is necessary to pay attention to strategies and skills, and its significance lies in using the system and information as a guide to fully understand the specific environment of the site , Select the correct ideas, strategies and methods for failure analysis, strictly organize the failure analysis process, avoid all kinds of confusion and mistakes, make up for insufficient conditions through appropriate methods, overcome various difficulties, reduce blindness, increase hit rate, and be fast and accurate Find out where the fault is and eliminate it, thereby achieving satisfactory work results.