In this study, the magnetic characteristics of the Halbach array in the Permanent Magnetic Levitation (PML) component of manned hybrid maglev systems were analytically derived using the Maxwell tensor method, and optimization suggestions for structural parameters were proposed. The focus of the research was to enhance the levitation force and reduce the lateral stiffness, which are crucial for improving the system’s load capacity and lateral stability. Based on the analysis of the magnetic flux density formula as presented by Halbach (1985), four independent variables were identified from seven interrelated parameters, simplifying the complexity of multi-parameter optimization. The analytical expressions for magnetic properties derived using the Maxwell tensor method provided theoretical guidance for multi-parameter optimization, avoiding the blindness of relying solely on finite element analysis. Contour plots were constructed to visually demonstrate the impact of parameter variations on magnetic characteristics, including magnetic flux density, levitation force, and lateral stiffness. Ultimately, a series of optimization cases for structural parameters were proposed in accordance with the design requirements of the manned hybrid Maglev system, and these cases were comprehensively evaluated through contour plot analysis. Furthermore, the finite element software FEMM was utilized to model and validate the optimal cases, thereby confirming the effectiveness of the analytical expressions for magnetic properties and the optimization strategy. This research not only provides theoretical support for the design of PML components but also offers new insights into the optimization of magnetic characteristics for hybrid maglev systems.