Abstract: Screening and preventive treatment for latent tuberculosis infection （LTBI） are important measures to reduce the incidence of active tuberculosis （TB） and its global burden. This paper discusses the current status of LTBI prevalence and preventive treatment， risk of incidence in high-risk groups， screening methods， and other interventions， emphasizing the importance of prevention and control as early as possible in a scientific strategy， so as to lay a solid foundation for eliminating TB by 2030.