The problems of low boring efficiency and high wear ratio of cutters affect tunnel-boring machines (TBMs) during hard rock tunnel excavation. Laser-assisted rock-breaking technology can reduce mechanical wear and accelerate rock removal and has the advantages of easy control and environment friendly. Furthermore, it may help improve rock-breaking efficiency. This article discusses the principle of laser-assisted TBM rock-breaking technology, introduces the recent development status of this technology, and analyzes existing problems and development trends.