At present, the development and design of power grid project mid-platform is in full swing. After completion, it can provide enterprises with full caliber, full link and full coverage project integrated management and provide globally standardized and consistent data information. It can be predicted that it is imperative for various projects of provincial companies to be connected to the project mid-platform. The distribution network planning project needs planners to carry out a lot of detailed work from demand to formulation and improvement. The development of each link of these works should not be implemented in project mid-platform. Therefore, a new distribution network intelligent planning project auxiliary platform that can be connected to project mid-platform is developed. The platform can be used as an "input plug" to access the data mid-platform to obtain required input data, and can also be used as an "output plug" to output the prepared complete project to project mid-platform. It provides a solution for the similar business. In the aspect of source side change data capture in synchronous mode, it obtains the source side change data by creating a temporary table, which reduces the amount of transmitted data. In the aspect of data operation identification, the source uses the "combination coding" to update the data and the destination analyzes it by itself, so as to avoid the confusion of interpretation. In order to save the parsing time of a large number of similar statements, the storage procedures of various data operations are formulated in advance at the destination to realize the convenient writing of synchronous data.