Perovskite solar cells (PSCs) has been developing rapidly at an unprecedented speed in the field of photovoltaics since 2009 and its certified record power conversion efficiency has exceeded 23%. Interface engineering is one of the most effective approaches for improving the performance of PSCs. This paper reviews the main progress in the interface engineering of electron transport layer/light absorption layer of PSCs. The related investigations have been classified into three categories, improving the quality of perovskite film, improving the energy level matching between the electron transport layer and the perovskite layer, and improving the stability of the solar cells, according to their effects. Finally, the prospect of improving the performance of PSCs through the interface engineering is prospected.