A new Ad hoc routing algorithm combining the dynamic source routing (DSR) protocol with the position prediction-based clustering algorithm is presented in this paper. In the algorithm the prediction-based algorithm is used to detach the different clusters, and to pass a reasonable position judgment based on actual needs and implement environmental, the same treatment is done aimed at the dynamically wireless network environment, by the way, the members in clusters do not need the routing function. Location information acquirement in this algorithm is from GPS or self-localization algorithm, the cluster heads run DSR protocol serves as a router, which makes the communications of different cluster members depend on the head of various clusters, thus greatly reducing the redundancy of the routing information. The simulation results suggest that the algorithm is good in packet deliver ratio and low in average delay.