This study aimed to investigate the potential involvement of SRD5A1 during MM pathogenesis, and the evidence from in vivo and in vitro data demonstrated that SRD5A1-mediated MM cell autophagy via PI3K/Akt/mTOR signaling pathway and induced MM cell apoptosis through Bcl-2 proteins family in MM. The gene discussed is SRD5A1; the disease is Miyoshi myopathy.