As one of the countries with high burden of TB and MDR⁃TB，China has a large number of Latent Mycobacterium tuberculosis infection（LTBI）. Finding adorable LTBI in time and effectively controlling LTBI epidemic and eradication of tuberculosis will be a major task for mankind to achieve the goal of ending TB. This paper briefly reviews the research progress of LTBI in recent years from the aspects of epidemiology，occur⁃ rence and progress，experimental diagnosis and treatment.