Polymer solar cells (PSCs) is considered as an emerging and clean energy, owing to its light weight, flexible, wearable, environmental compatibility and other prominent advantages. Therefore, it is paid attention by governments, enterprises and scientists. The power conversion efficiency (PCE) of PSCs has already exceeded 10% through study and exploration more than 30 years, showing a good application prospects. The improvement of the PCE was due to understanding of the photophysical process of PSCs, and also depended on synthesis of highly efficient polymer materials and regulation of the PSCs device structure. To review the progress on PSCs in recent years, the research progress of active layer morphology control, interface modification and device configuration of the PSCs were reviewed in this paper. Finally, the development trend of PSCs was discussed.