To enhance the performance of anti-narrow-band-interference and anti-follower-jamming in frequency hopping communication system, a new FH sequence with wide gap is proposed in this paper. The method generates chaotic sequence through combined map and ranking quantization, and constructs wide gap FH sequence by permuting the chaotic sequence. Simulation and analysis results show that the proposed FH sequences have better performance in uniformity, hamming correlation and circle gap distribution compared with the common wide gap sequences of Radom-Shift-Replace method and Dual-Band method based on Logistic chaotic map.