Throughthe analysis andresearchofthecraterdefects ofthebody coating,itis clearthatthecraterdefects of the coating are mainly divided into three categories:electrophoresis shrinkage defects,paint shrinkage defects and varnish shrinkage defects.At the production site,measures such as increasing the oil removal filter bag of electrophoresis tank liquid increasingthereplacementfrequency ofthe arm sleeve ofthe painting robot,optimizingthe operation sequence and process parameters ofthe on-site operators were takento effectively eliminatethe craterdefect ofthe body coating andeffectively improvethe appearance quality ofthebody coating.