This paper proposes a microwave mode-locking frequency comb scheme using active mode-locking technology and photoelectric oscillator. The scheme uses traditional optoelectronic oscillators (OEO) as oscillators, and uses a mixer to add microwave modulation signals from outside to form an optoelectronic oscillator. The mode-locking of the oscillator oscillation mode realizes the microwave active mode-locking. At this time, the oscillator generates a series of frequency combs with equal frequency intervals. When the system loop cavity is 1 km long, low-phase-noise microwave comb signals with a frequency interval of 201.2 kHz are obtained through experimental analysis. The first-order carrier phase noise of the microwave comb signal is -97.2 dBc/Hz@1 kHz and -116.721 dBc/Hz@10 kHz, and the line width is approximately 10 Hz. The scheme is considerably improved in the phase-noise index compared to the conventional microwave frequency comb generation method. Furthermore, microwave frequency combs signals with a tunable frequency interval ranging from 100 kHz to 6 MHz can be obtained by changing the cavity length and modulation signal frequency of OEO.