目前空间数据的传输效率低下已成为制约WebGIS发展的主要瓶颈之一。多线程技术以及多点连接在提高系统吞吐率、有效利用系统资源、改善用户任务之间的通信效率等方面有着显著作用。本文采用地图分层和图面分割的方法以及Java多线程和多点连接技术实现了WebGIS空间数据的高效传输。-Transmission of the current inefficient spatial data has become a major bottleneck restricting the development of WebGIS. Multithreaded technology and multi-point connections to improve system throughput, efficient use of system resources and improve the efficiency of communication between the user and so the task has a significant effect. In this paper, the map layer and the segmentation method and the surface Java multi-threading and multi-point connection technology to achieve the efficient transmission of spatial data WebGIS.