Photoelectric oscillator is a microwave photonic signal generation technology that converts optical energy into microwave energy through photoelectric feedback loop. Photoelectric oscillator (OEO) can be used as a high-performance signal source and has a wide range of applications. Therefore, a dual loop polarization multiplexed photoelectric oscillator based on stimulated Brillouin scattering of optical fiber is proposed, which improves the quality of microwave signal generated by photoelectric oscillator, improves the side mode rejection ratio and tunable range, indicating that the performance of microwave signal generated by polarization multiplexed dual loop photoelectric oscillator is effectively improved.