The development of laser technique has promoted the progress of modern science and technology, and changed the life of human beings. Among them, the miniaturized laser light source has become one of the research hotspots. Due to the effect of the intensity confinement of metal plasmon, plasmonic nano lasers are able to achieve ultra-small physical size which can break through the optical diffraction limit, and achieve the high modulation speed and minimum lasing threshold, so it is widely concerned. In this review, the recent progress of plasmon nanolasers at home and abroad is discussed. The gain media, metal species, and device structures are compared and summarized. Finally, the future development potential of the plasmon nanolasers is discussed and prospected.