The box of the maglev electromagnet in the maglev state will produce deflection deformation because of suction and impact. A flexible fixing mechanism was designed to fix the magnetic yoke to avoid the coupling stress between the magnetic yoke and the box in the deformation process. Combined leaf springs were designed on both sides of the magnetic yoke so that the magnetic yoke was in a pretension state. When the magnetic yoke was moved by the impact, the leaf springs can make it return to its original position and achieve goal of the flexible fixation. Through the design theory and simulation calculation, the load-displacement relationship between the leaf spring with different thickness was analyzed, and the stiffness and strength of the leaf spring meeting the requirements were designed. The experimental results showed that the design method was feasible and effective