To promote the development of photovoltaic（PV） power generation and speed up the efficient use of new energy source， several MW level grid-connected PV power plant demonstration projects have been successively started and completed in China. The paper reviews the operating experience of both domestic and foreign large-scale PV power plants， the main problems， the converters and grid-connected impacts. It also describes the main features and progress of the key technologies， summarizes some inspiration on the construction and operation of large-scale PV power plants， makes a forecast of its prospects and technology development trends.