Abstract: With the development of relay protection devices toward high integration and high reliability, traditional control circuit simulation methods based solely on logical rules can hardly accurately reflect the real dynamic behavior of components under complex working conditions. To improve the physical authenticity and risk identification capability of relay protection control circuit simulation, focusing on the characteristics of strong electromagnetic-mechanical coupling, this paper constructs an electromagnetic-mechanical coupling model for components of the control circuit and proposes a logic-physics hybrid simulation algorithm. Through hybrid state machine and dynamic reconstruction of circuit topology, the fine characterization of contact movement, bouncing, arcing and other processes is realized. Simulation tests and verification are carried out for typical scenarios, and the results show that this method has obvious advantages in simulation accuracy and stability, and can effectively support the engineering analysis and verification of relay protection control circuits.