Mobile users and wireless devices are now the sources of a large volume of data. In such data-intensive mobile and wireless computing systems, Delay-Tolerant Network(DTN) routing plays a critical role in data routing, dissemination, and collection. Therefore, Contact Duration-based Routing (CDR) is proposed in this paper. A new routing problem that the transmission of large volume of data cannot be completed in one contact is introduced ?rstly for data-intensive routing. Then the weight of the path is calculated by three kinds of information including contacting frequency, contacting duration and the available space of the cache area. Taking the path with the maximum weight as the shortest path, data is transmitted according to this path. Simulation results show that compared with Spray-and-Wait(SW) routing, CDR routing can effectively improve packet delivery rate.