As the successively implementation of State Grid's information system first-degree deployment, the tables in database become much more than before, the datas in table become very large. Massive data storage and access caused considerable load on the database, data processing capacity and access encounter bottlenecks. The amount of data is growing rapidly based on State Grid first-degree deployment, this paper proposed data fragmentation middleware UAPDS (UAP DB Sharding) technology. UAPDS provides multiple split solutions, such as separated of reading and writing, divided into multiple tables in a database or in multiple databases, by router, partition, shard three layer split mode, the data cut into different databases or tables according to certain rules, effectively relieve the pressure on the database, improved the efficiency of data access, achieved better in the practical application effect.