For solving poor generality of security level control system architecture, develop the reconfigurable security level control system based on 1oo2D vote architecture. Introduce the usual 1oo2D configuration realization, logic subsystem 2oo4D configuration realization, input/output subsystem 1oo1D configuration and main controller hot standby configuration realization, verify the design and compare it with foreign DCS system. The results show that the system can improve the flexibility and generality of evaluation, the system can be applied to different security protection level requirements only by change user configuration software and hardware card configuration.