To investigate the impact of Sufentanil on the progression of endometrial cancer (EC), including its proliferation, migration, epithelial-mesenchymal transition and underlying mechanism. The effects of Sufentanil on EC cell growth were evaluated using Cell counting kit-8 (CCK-8) and colony formation assays, while wound healing and transwell assays were performed to assess the influence on motility. In addition, immunoblot assays were performed to determine its role in EC cell epithelial-mesenchymal transition (EMT) and the associated underlying mechanism. Sufentanil demonstrated the ability to inhibit EC cell growth, migration, invasion and EMT process through the inhibition of the Protein Kinase B (AKT)/nuclear factor kappa-B (NF-κB) axis, thereby contributing to the repression of EC progression. Sufentanil effectively inhibited the proliferation, migration and EMT of endometrial cancer, demonstrating a potentially effective approach against EC.