It is still a laborious work to consult massive multidisciplinary geological maps which are scattered in different geological departments��and hard to give full play to the potential application value of geological map�� Along with the network��the development of communication and computer technology��especially with the Web2�� 0 technology arisen��provides opportunities to the web for sharing of geological maps�� Web fast sharing platform of massive geological maps( WSPGM) is based on the Flex technology development��using B/S architecture�� with map navigation��search��display��security and other functions of the software system�� Through the map pretreatment and asynchronous communication the system can display any size of geological map��and through the range limits��rights management��sharing system and watermark logo to take effective security on geological map�� On the basis of this system��with the Jilin University web sharing system of geological map��the system can greatly improve the efficiency of using geological map�� for research��