With the growing demand for the miniaturization and integration of coherent light sources, the research of micro and nano lasers has become a hot spot in the field of basic physics and optoelectronic devices. In recent years, the rapid development of new semiconductor materials and nano processing technology has significantly improved the performance of micro/nano lasers. In this paper, the development status of micro/nano semiconductor lasers is systematically reviewed, including the resonance mechanism based on different types of optical microcavities, the application of diversified gain materials (especially perovskite semiconductor), as well as new mechanisms such as exciton polariton laser and superradiance. Finally, the challenges and future development of micro/nano semiconductor coherent light sources are prospected.