The satellite network systems complex and costly, to assess the satellite network survivability is important, to assess the satellite network survivability first to assessment of the importance of satellite network node. The existing methods to assess the accuracy of inaccurate problems and high dynamic characteristics of the satellite network topology, a new evaluation method based near the center of the rapid assessment of the importance of satellite network nodes, case study shows that this method is simple, intuitive, and results of the assessment more reasonable.