Metal halide perovskites have been regarded as remarkable materials for next-generation light-harvesting and light emission devices.Due to their unique optical properties,such as high absorption coefficient,high optical gain,low trappingstate density,and ease of band gap engineering,perovskites promise to be used in lasing devices.In this article,the recent progresses of microlasers based on reduced-dimensional structures including nanoplatelets,nanowires,and quantum dots are reviewed from both fundamental photophysics and device applications.Furthermore,perovskite-based plasmonic nanolasers and polariton lasers are summarized.Perspectives on perovskite-based small lasers are also discussed.This review can serve as an overview and evaluation of state-of-the-art micro/nanolaser science.