To deploy distributed controller in large-scale SDN network, this paper optimizes the controller placement from improving resilience and reliability, puts forward Two-stage Controller Placement (TSCP) method: uses the similarity of node to divide control domain, enhances the connectivity among device in the control domain; selects controller set with the minimum average rate of control path loss as the controller placement for improving the reliability. By constraining the size of control domain and the propagation delay among equipment (switches or controller), makes the number of switch in control domain equalization and the controller placement reasonable. By defining performance indexes, compare GCP algorithm and K*-means algorithm with TSCP algorithm in experiments, the results show that TSCP algorithm can optimize the scale of control domain, balance the number of switches in control domain, reduce the number of controllers, and perform better in network elasticity and reliability.