Considering the multi-access branches, the diversity of operation modes, and the complex reconstruction, there exist many problems such as long-term power failure, inflexible operation mode during the reconstruction for the bus differential protection device. In view of this situation, combined with the abundant reconstruction experience, based on the analysis of the specific secondary circuit configuration, the modification scheme of intelligent interface based on the traditional bus protection device and the GOOSE export transfer is proposed. In this way, it can be possible to realize the reconstruction with uninterrupted power for bus protection in intelligent substation under the situation of multiple modes without any changing of the secondary circuit wiring. Through the application of the scheme, the key issues of intelligent reconstruction for the traditional substation can be solved. Besides, it is significant to promoting the intelligent substation construction.