The latest progress of single-junction non-concentration crystalline silicon solar cell research of which photoelectric conversion efficiency up to 25% is summarized. The reason why passivated emitter, rear locally-diffused (PERL) structure, interdigital back-contacted (IBC) structure, hetero-junction with intrinsic thin-layer (HIT) structure and hetero-junction back-contacted (HBC) structure solar cells have so high efficiency is explained. Combined with the current status of China′ s silicon-based photovoltaic industry, the development trends are predicted, and the technical demands are analysed.