Map is the entry of GIS, it is the prime consideration that how to show map quickly. Rapid map display mainly relates map data organization and map display technology. Presently, most of business map software represented by google map use map tile to organize map data, it is thought to be fast and useful. Using foregoing methods to organize map data and using tile concurrency control and tile double buffer technology, this paper is mainly about the tile map display technologies of mobile GIS and the purpose is to provide a method for showing tile map quickly. Based on the research findings, the authors have developed mobile GIS systems in windows mobile and android platform respectively, and the systems have been used in actual projects successfully.