The balanced-force relay controls the closing and opening of contacts by energizing the coil to achieve power control. The actual products of relays have strict requirements for their pickup voltage and dropout voltage, so in addition to the coil voltage value, parameters such as pickup force need to be considered when designing relays. Products with poor matching of pickup and reaction forces may experience parameter deviations, asynchronous pickup and dropout, and other phenomena, resulting in a decrease in product qualification rate. This article proposes an electrical performance optimization scheme based on the simulation analysis of the electromagnetic attraction force and mechanical reaction force of the balance force relay, in response to the phenomenon of the pickup and dropout voltage parameters exceeding the tolerance. By appropriately optimizing the structure of the yoke and armature, the product qualification rate can reach over 80%.