When the intelligent human machine interface and control center operate respectively the line bay isolation switch and bus-coupler circuit breaker，the dynamic change of disconnector position will cause bus-coupler interlocking failure.Multiple bays interlocking with reservation logic is proposed to solve the misoperation caused by the multi-agents operating the bay device respectively.The reservation mechanism of multiple bays interlocking is analyzed，the control command state machine and service tracking in the IEC 61850 7-2 Ed2.0 is described，and the CILO interlocking model with reservation logic and reservation logic algorithm based on the control commands analysis is put forward.Furthermore，the general multiple interlocking architecture based on service tracking and reservation logic is proposed，and its information interaction process is designed.