A ground high-temperature high-efficiency solar steam electricity-generating device includes a light convergence assembly (1), a heat exchanger assembly(3), a heat storage chamber assembly(5), a base assembly(2), an oil pump(15), a temperature-controlling valve(16), a steam turbine(13), temperature-controlling valve (16), a steam turbine (13), an electricity-generator (12), a system control circuit, a water pump (9) and a water tank assembly (10). The light convergence assembly (1) includes a glass plate (1-1), Fresnel lenses, a U-shaped groove (1-3), a thermal insulating material, a heat collecting pipe (1-5), high temperature heat conducting oil(6-6), a frame (1-7), a rib-plate and a spindle sleeve. The high temperature heat conducting oil(6-6) in the heat collecting pipe (1-5) is communicated with the heat exchanger assembly (3) and the heat storage chamber assembly (5), so that the warm water in the heat exchanger assembly (3) is quickly converted into high temperature steam which drives the steam turbine (13) and the electricity-generator (15) to generate electrical energy. The device can realize high solar utilization, high automaticity, simple structure, lower cost, small size, and is safe and reliable.