The invention discloses a silicon and perovskite-laminated solar cell structure and a preparation process method thereof, mainly to solve the problems of low conversion efficiency and large energy consumption of the existing solar cell. The cell structure comprises a cathode (1), an N-type silicon wafer substrate (2), a P-type conductive material (3), an electron transport layer (5), an interface modification layer (6), a perovskite material (7), a hole transport layer (8) and a mesh metal anode (9) from bottom to top, wherein a buffer layer (4) is arranged between the P-type conductive material (3) and the electron transport layer (5), the three are tightly combined, a laminated structure with the P-type material of a silicon solar cell and the electron transport layer of a perovskite solar cell is formed, the sunlight absorption rate is improved, an annealing process below 200 DEG C is adopted during the preparation process, high temperature is avoided, energy consumption is reduced, and the structure can be applied to a portable energy, an energy window and a wearable electronic device.