针对传统卫星广播重传策略信道占用率较高、重传次数较多的问题，高链路丢包率下的基于网络编码的广播重传策略不能达到重传性能最优的问题，以及最大团策略计算开销较大的问题，提出了一种改进的基于网络编码的广播重传策略。理论分析及仿真实验证明了改进的基于网络编码的广播重传策略较好地解决了以上重传策略的问题，保证了卫星通信中的组播数据的快速、可靠的发布。-Aiming at the problems of traditional satellite broadcasting retransmission scheme, high loss broadcasting retransmission approach based on network coding and maximum weight clique algorithm, we present an improved network-coding-based broadcasting retransmission scheme. Simulation results indicate that compared with high loss broadcasting retransmission approach based on network coding, our proposed scheme solves the problem of the encoded packets which can’t be decoded by all receivers and the problem of the lower performance when the number of receivers are large, besides, compared with maximum weight clique algorithm, computational overhead of our proposed scheme is less.