As the laser host materials,laser fluoride crystals have played important roles in the research and development of solid-state lasers from 1960s.Compared with other laser host crystals,the laser fluoride crystals have outstanding advantages,such as long fluorescence life-time,negative refractive index change with increasing temperature,lower thermal lensing effect and thermal physical property etc.Thus fluoride crystals have been widely employed in solid-state lasers.The properties and applications in solid-state lasers of fluoride crystals are emphasized in this paper,moreover,the future investigations on laser fluoride crystals are predicted.