Abstract: In recent years, all-inorganic perovskite solar cells have become a hot topic in the photovoltaic field due to their excellent optoelectronic properties and outstanding thermal stability. This type of cell has achieved a photovoltaic conversion efficiency (PCE) of 21.15%, and further improvements are expected. However, the effective area of currently efficient all-inorganic perovskite cells is relatively small, mostly around 0.1 cm², and the PCE of large-area all-inorganic perovskite solar cells will decrease significantly with an increase in effective area. The preparation of large-area cells is crucial for the commercial application of all-inorganic perovskite solar cells. In order to make all-inorganic perovskite materials better apply in the photovoltaic field, it is the simplest and most effective method to construct a multi-component composite structure and adjust the preparation process of all-inorganic perovskite. This article provides a systematic review of the progress in large-area all-inorganic perovskite solar cells, summarizing the achievements of all-inorganic perovskite solar cells with larger area. An analysis of the current status of large-area all-inorganic perovskite solar cells is also presented, and systematic summaries are given for the process of preparing large-area perovskite solar cells and strategies for optimizing cell performance. Finally, the future development trends in this field are discussed.