Objective To summarize the experience of clinical diagnosis and treatment for recurrence and progress of relieved myastbenia gravis after thymectomy. Methods 22 recurrent and progressive after relieved pa-tients with myasthenia gravis who underwent thymectomy were retrospectively analyzed. The remission therapy was conducted with combined glucocorticoid and anticholinesterase and its effectiveness was estimated. Results It was 1,17,4 as better Osserman scale Ⅰ , Ⅱ , Ⅲ respectively before operation but 15,6,1 as better Osserman scale Ⅱ , Ⅲ, Ⅳ respectively in recurrence and progress of relieved myasthenia gravis after thymectomy besides 6 with myas-thenic crisis. Complete remission and partial remission were gained in 9 patients and 12 patients respectively. There was 1 hospital-death. Conclusions Recurrence and progress can occur in any patient of relieved myasthenia gravis after thymectomy. Bulbar myasthenia gravis is usually presented as dysphagia. Reasonable administration of glucocor-tieoid could improve majority of recurrence and progress of relieved myasthenia gravis after thymectomy but responses poorly to the anticholinesterases.