Abstract: This paper set up a whole data link model of the JTIDS by analyzing the frame of it, implemented the simulation of the entire system. Aiming at the anti-jamming means of the JTIDS such as spreading spectrum, frequency hopping and redundancy coding, proposed a jamming method using sawtooth-wave frequency modulation and analyzed the performance of single carrier frequency narrowband jamming and multi-carrier frequency broadband jamming. The result of simulation indicates that the multi-carrier frequency broadband jamming outperforms the single carrier frequency narrowband jamming.