The combined modulation methods as well as various encoding methods adopted in Joint Tactical Information Distribution System (JTIDS) guaranteed the message transmission reliability. The anti-jamming performance of JTIDS on rice fading channel is analyzed; the symbol error rate and the message discarded rate of the system in partial band noise interference are derived by simulation. The simulation result shows that various anti-jamming technology such as RS encoding, and Interleaving and DS/FFH MSK modulation combined in JTIDS can improve the performance of data link communication so much that a lower symbol error rate and message discarded rate can be obtained in complex channel environment and the requirement of message transmission reliability is satisfied.