The saturable absorber laser has the characteristics of high output power and high peak power.It is widely used in military,processing,medical treatment and scientific research fields.It is commonly used for ranging,micro processing of electronic devices,atmospheric detection,spectral research,surgery and Ophthalmology,plasma diagnosis,pulse holography and laser nuclear fusion.In recent years,there are few lasers using perovskite structure materials as saturable absorbers,but perovskite materials have excellent performance in the laser field due to their excellent photoelectric properties.In this paper,the research progress of laser based on perovskite saturable absorber is reviewed and the future development direction of perovskite saturable absorber laser in the 2μmfield is prospected.