Abstract: In order to get higher frequency signal, a 24-tupling frequency microwave millimeter-wave signal generation scheme based on parallel Mach-Zehnder modulators (MZM) and semiconductor optical amplifier (SOA) four-wave mixing effect was presented and simulated.The local oscillator signal was modulated by parallel MZM to obtain high-purity ±4 sidebands.Under the four-wave mixing effect, the ±12 sidebands were generated.The ±4 sideband was filtered by cascaded Bragg grating filters.After the beat frequency of photoelectric detector, 24-tupling frequency signal was generated.The results show that, when input local oscillator signal is 5GHz, radio frequency spurious rejection ratio of the generated 120GHz high frequency microwave millimeter wave signal is 22dB.The spectrum purity is high, and the tunability is good.This study provides a high frequency doubling method for the generation of high frequency microwave and millimeter wave signal.