For these problems such as redundancy control packet, not fully utilizing information of new paths to complete the follow-up paths, this paper proposes an efficient and low-delay LEO(low earth orbit) satellite network routing algorithm based on on-demand mechanism EIORA(efficient improved on-demand routing algorithm). The proposed algorithm reduces control overhead and increases the universality of routing update by making full use of the control groups of the source and target satellites. At the same time,...