High extinction ratio laser can be obtained in non-polarization-maintaining fiber by the active polarization control technology. Compared with the polarization-maintaining laser generated by the polarization-maintaining fiber laser, this method has the characteristics of simple process and low price. This paper mainly introduces the basic principle of active polarization control technology, systematically expounds the development of fiber laser active polarization control technology at home and abroad in recent years, and summarizes the general trend of active polarization control technology development. The algorithm of active polarization control and the phase-locked of polarization coherent beam combining is simply sorted out. Finally, the development direction of active polarization control and the phase-locked of polarization coherent beam combining is prospected.