Myasthenia gravis (MG) is an autoimmune neurological disease that is often accompanied by other autoimmune diseases, leading to complex and diverse clinical manifestations. The presence of comorbidities can affect the treatment and prognosis of patients, necessitating attention to these phenomena. This article mainly discuss research progress on MG complicated with other autoimmune diseases, aiming to increase readers' awareness of MG comorbidities, enhance understanding of the characteristics of these conditions, improve clinical diagnosis and treatment of these comorbidities, and ultimately improve patient prognosis.