Abstract: Based on beam halo-chaos synchronization in the beam transport network (line) with small-world effect, using three synchronization methods: the driver response synchronization, small-world topology coupling synchronization and multilocal small-world topology coupling synchronization, three kinds of secure communication projects were designed respectively, and were studied numerically by the Simulink tool of the Matlab software. Numerical experimental results demonstrate that encryption and decryption of the original signal are realized successfully. It provides effective theoretical foundation and reference for the next engineering design and network experiment.