Based on the triple Data Encryption Standard(DES)block cipher frequency-hopping(FH)sequences, a kind of packet protocol for frequency-hopping multiple-access(FHMA)network is suggested in this paper. In theory, the performances of both the packet error and the throughput are derived, which shows that the ratio of the packet length M to the frequency slots number q is most key parameter to determine the FHMA system performance under the condition of large user number. Computer simulation results of 3-DES FH sequences compared with those of the chaotic FH sequences are also included to support our developments.