Inverted perovskite solar cells (PSCs) have been attracted more and more attention thanks to its simple architecture, negligible hysteresis, and low manufacturing cost. Electron transport layer is an important component of perovskite solar cells, which is facilitate with electrons transfer and blocks holes. The modification of electron transport layer can effectively improve the roughness for surface, energy level, and electron mobility, so as to improve the photoelectric conversion efficiency. In this paper, the influence of ETL on the performance of inverted perovskite solar cells is reviewed from the selection of electron transport layer materials, interface modification and doping of electron transport layer and the modification, and the commercialization of inverted perovskite solar cells in the future is prospected.