Electromagnetic blank holding for forming complex parts has received considerable attention due to the flexibility in die design and force control. However, electromagnetics experience overheating with continuous current loading for traditional variable blank holding force, which restricts widespread and long-term applications. The discretization of the blank holding force was first proposed to solve this issue, where mechanisms of thermal effects and the deformation of the part with the discrete current loading, which is significant for high-quality forming, remain to be further clarified. This study established a general thermal model for multi-poles in electromagnetics using Fourier's law of heat transfer. The temperature variations in different discretization levels of force were revealed by simulation and experiments. The appropriate discrete level of the force was applied to the forming process of the sheet material, reflecting the law of its influence on the deformation. With optimized discretization blank holding force, high forming accuracy was observed in forming thickness and microstructure tests. Results indicate that the discretization blank holding force can keep the die at a much lower temperature and is promising for improving the forming accuracy of the part. This work assists in designing the blank holding force and electromagnetic die for better forming and efficiency in long-term production.