For the requirements of quickly updating of terrain data using in the Changjiang Electronic Navigation Chart,this article analyzes the present work flow of the waterway terrain surveying and mapping and points out some main time-consuming factors.Based on the network transmission technology,systems integration and multi information fusion technology,we present some resolutions and key technologies of improving the efficiency.The analysis of efficiency restriction factors and resolutions for improving efficiency will greatly promote the research on quick acquiring and preprocessing technology for topographic information and the system implementation.