Abstract: Based on the analysis on the need of security authentication for satellite network and the characteristics of satellite network，design an end-to-end authentication protocol for satellite network.Based on IKE，this protocol can realize the identification between the earth and satellite，identification between satellites and negotiation of communication key.In addition，to verify the feasibility of the authentication protocol，design a simulated satellite network platform composed of many satellites.Seen from the testing result of the performance，the protocol demonstrates quite high efficiency，suitable for the satellite network environment.