To the ambiguous question of data from multi-souce sources vector map, the paper described the overall framework, content and methods of data integration and fusion. Data integration includes unification of spatial reference, spatial data model and semantic coding. The method of data integration includes data format conversion, data mutual operation and data direct accessing. Data format conversion method is chosen in this paper because it is easy and practical. A self-adaptive iterative algorithm of matching the same entity in fusion is proposed in this paper which is significant in improving reliability of data. Finally, this paper takes digital vector map and digital vector chart for example to integrate and fuse data and the result is discussed.