Electromechanical actuators (EMAs) represent a significant development trend in aviation onboard actuation systems. To address the reliability and maintainability requirements of drive motors for all-electric actuators, this paper proposes the use of a Modular Stator Switched Reluctance Machine (MSSRM) as the drive motor for EMAs. From a maintainability perspective, a novel structural design for the MSSRM is introduced, in which the stator modules can be independently replaced. To comprehensively evaluate the electromagnetic characteristics, torque performance, and vibration behavior of the proposed MSSRM configuration, finite element analysis (FEA) was conducted and compared with a Conventional Switched Reluctance Machine (CSRM) of the same dimensions. The results reveal that: (1) The magnetic reluctance of the MSSRM is lower than that of the CSRM due to its shorter magnetic path; (2) The magnetic circuit of the MSSRM is more susceptible to saturation, resulting in similar torque density at low currents but lower torque density at high currents compared to the CSRM; (3) The spatial distribution of radial forces differs between the MSSRM and CSRM, leading to distinct vibration modes; (4) Under identical operating conditions, the stator vibration of the MSSRM is more pronounced than that of the CSRM. To validate the performance of the MSSRM, a prototype was fabricated and tested. The experimental results are in good agreement with the FEA results, confirming the accuracy and effectiveness of the analysis.