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[Objective] To meet the training needs of metro drivers and maintenance personnel in studying metro control circuit principles, a MTCCS (metro train control circuit simulation system) is designed to address the issues of high coupling and complex control logic in metro control circuits. [Method] The overall structure of the MTCCS is introduced, and a logical control model of metro train control circuit is established. The depth-first path search algorithm is used to search for all valid paths in the network topology diagram, establishing the mathematical relationship between nodes, branches, valid paths and component states, and cooperating with relay linkage control to establish the logical control model. Taking the control circuit of Shanghai Rail Transit Line 15 as example, simulation testing is conducted on proposed control circuit simulation system. [Result & Conclusion] The proposed control circuit simulation system can meet the learning and training needs of metro drivers and maintenance personnel in understanding the principles of metro control circuits, posing practical value.