The invention discloses a solar power generation device, comprising thin-film solar cells, N-type semiconductors, P-type semiconductors, a heat conducting base, a storage cell unit, a controller unit, temperature sensors, a water pump, electronic control valves, water pipes, electric telescopic rods, a strut, a threaded telescopic rod, a supporting bottom plate and a sensing head, wherein the N-type semiconductors and the P-type semiconductors are in transverse H shapes; guide baffles are staggered in the water storage cavity of the heat conducting base; the two electric telescopic rods and the strut are supported between the heat conducting base and the supporting bottom plate; the N-type semiconductors and the P-type semiconductors are arranged at intervals, and the adjacent N-type semiconductor and P-type semiconductor are connected in series; a plurality of thin-film solar cells are connected in series and then connected in series with the N-type semiconductors and the P-type semiconductors to charge the storage cell unit. The device effectively combines solar power generation and temperature difference power generation, provides a very effective technical solution using solar energy and geothermal energy, and has higher power generation efficiency.