Metal halide perovskites possess excellent photoelectrical properties and have extensive applications in the fields like solar cells and photoelectric detection. They also show wonderful emission properties and full band emission in the visible range can be realized by adjusting the type and ratio of halide atoms. In addition, the full width at half maximum of the emission light is narrow, which makes this kind of materials widely used in the fields like display. These properties make metal halide perovskites very suitable as laser gain materials. Moreover, the low-dimensional metal halide perovskites themselves can be used as a natural optical cavity, which makes lasing possible. Much significant progress has been made on the related research.