Objective To investigate the CT features of miliary tuberculosis in HIV-positive patients, it is recognized that differences in CT signs of lung in HIV-positive and negative patients may help to establish an early diagnosis of the immune status of patients with miliary tuberculosis. Methods Helical CT features (distribution,size,density and Sharp margin of miliary nodule, and hydrops pericardil , Pleural effusion, Mediastinal lymphadenopathy,and attenuation of the lung,and extrapulmony tuberculosis) of 12 HIV patients complicated by military pulmonary tuberculosis and 40 patients with miliary tuberculosis metastatic nodules were retrospectively reviewed. Results The uniformly distribution and density and size of the bilateral lung and Sharp margin miliary pulmonary nodules , hydrops pericardil, Pleural effusion, Mediastinal lymphadenopathy, and attenuation of the lung,and extrapulmony tuberculosis,were observed in 9 HIV infection of military pulmonary. Conclusion AIDS with millet grain size and the shape of pulmonary tuberculosis with ChanChunSu tuberculosis on the distribution of the nodules, size and density, nodal brim, mediastinal lymph node enlargement, serous cavity effusion, extrapulmonary tuberculosis spiral CT clearly different performance characteristics, these characteristics have close relationship with their own immune function.