Abstract: In order to improve the application of optoelectronic oscillator, a kind of embedded electrical gain ring resonator mini optoelectronic oscillator structure was introduced in this paper. The demonstrated principle of the electrical gain ring resonator optoelectronic oscillator was using the electrical splitter and amplifier realizing a ring resonator cavity which was equal to a filter comb to select the right mode of the optoelectronic oscillator, combined with directly modulated DFB laser, simple mode fiber and photo-detector, a mini optoelectronic oscillator structure was realized. The principle of the electrical gain ring resonator was analyzed and verified by the simulation. In the experiment, a high quality RF signal with the center frequency of 12.624 GHz was realized, the phase noise of the generated signal was -102 dBc/Hz at 10 kHz offset. The proposed scheme can generate higher quality RF signal with a simple structure, it can be a solution to the practical application of optoelectronic oscillator.