<p>The Sweeping Jet Actuator (SJA), as an active flow control technique, has demonstrated proven effectiveness in suppressing secondary flows in axial compressors. To achieve more flexible and efficient corner separation control in compressor cascades, a novel laterally curved SJA is designed in this study. Compared with conventional straight SJA, the laterally curved design allows close-fitting installation along the suction surface of the blade, enabling more direct momentum injection into the corner region. This enhances the removal of low-energy fluid and effectively suppresses the development of secondary flow structures. The Unsteady Reynolds-averaged Navier-Stokes (URANS) method are conducted to investigate the influence of lateral curvature on the sweeping frequency, jet behavior, and internal flow characteristics of the SJA. The results indicate that increasing the curvature enhances the sweeping frequency and jet velocity at the outlet, with the jet momentum shifting upward away from the centerline, while the sweeping angle is moderately reduced. In particular, the sweeping frequency of the SJA can be increased by up to 30% as the curvature increases. When applied to a linear compressor cascade, the curved SJA effectively inhibits the development of Passage Vortices (PV) and Concentrated Shedding Vortices (CSV), resulting in a reduction of total pressure loss by approximately 13%. These findings demonstrate the superior flow control performance of laterally curved SJA in axial compressors and provide guidance for their wider engineering application.</p>