Disclosed is a method for constructing the safety service of a reconfigurable network. The method comprises the first step of a safety substrate configuration stage and the second step of a safety service constructing stage. According to the safety substrate configuration stage, a safety strategy storeroom is built. The safety service constructing stage comprises five parts of determining a safety demand, making a safety scheme, determining a safety service path, constructing safety element ability and adjusting the safety service in real time. The safety service constructing process is designed into a dynamic adjustment iterative process, the performance demands for the reconfigurable basic network difference service, multi-stage safety demands, dynamic structure reconstruction and safety function dynamic reconstruction are met, a safety substrate is used as a function foundation, and the characteristic that the safety substrate is embedded into a reconfigurable basic network system structure is achieved.