In order to improve the number of mmWave multiples generated and reduce the system complexity ,a fil- terless 16-tupling millimeter-wave generation scheme based on triple-parallel Mach Zehnder modulator( MZM) is pro- posed. This scheme uses two MZMs in parallel to generate the carrier and the 8th order optical sidebands , suppresses the carrier by adjusting the DC bias voltage of the third MZM , and obtains a 16-tupling millimeter-wave signal by the photodetector( PD) beating frequency. The principle of 16-tupling millimeter -wave generation is analyzed in detail , and the feasibility of the scheme is verified by simulation. The optical sideband suppression ratio ( OSSR) is achieved 29. 7 dB. All at once ,the value of radio frequency stray suppression ratio ( RFSSR) is 24. 6 dB. According to the simu- lation results , the influence of the shift of modulation index , modulator extinction ratio , DC voltage offset of MZM- 3 and phase difference of MZM- 1 and MZM-2 ratio frequency signals on the system is analyzed , and the results show that the system can still obtain good performance within a certain deviation range.