With the development of cyber-attack technology, it is more and more difficult for a single safety product to respond to cyber-attacks, so combination of various safety products is required. In power grid, various safety products are independent, lack interactions and can not find potential cyber-attack. So an online interaction module of power grid information secure three-defenses is proposed. With the mapping of connections information, this module achieves accurate interaction of power special safety protection products with various firewalls. By the global association analysis of security event, the module can achieve active defense in power grid.