The invention presents a novel large-area perovskite solar cell device. The resistance of cells can be reduced, and the photoelectric efficiency of the device can be improved. The device is characterized in that the device includes a plurality of cell units connected in parallel, and each cell unit is formed by connecting a P-i-N perovskite solar cell and an N-i-P perovskite solar cell in series.By adopting a novel device of large-area perovskite solar cells with a parallel structure, large resistance and other problems of the traditional series structure of large-area perovskite solar cellscan be avoided, the photoelectric efficiency of the device can be improved, and the application of a low-cost transparent conductive substrate can be facilitated. The order of layers of the novel device is not limited to an electron transport layer, a perovskite active layer and a hole transport layer from top to bottom, but also can be a hole transport layer, a perovskite active layer and an electron transport layer from top to bottom. Therefore, the selectivity of the substrate is increased, and the cost is reduced.