Since New Coronal Pneumonia was prevalent all over the world in 2019，many patients who have been infected with New Coronal Pneumonia have different symptoms after acute infection，involving various organs of the body，and their symptoms may last for a long time，which is calledLong COVID⁃19 syndrome. Long COVID⁃19 syndrome is not equal to the sequelae of COVID⁃19，it′s a long⁃term persistent symptom after virusinfec⁃ tion，mainly involves respiratory，cardiovascular，nervous，digestive and other systems.This paper reviews the Long COVID ⁃19 syndrome，aiming to improve the clinical attention to the Long COVID ⁃ 19 syndrome and improve the treatment effect of COVID⁃19. 

"> SARS?CoV?2, long COVID?19 syndrome, complication, sequelae