Objective: To assess the imaging features of necrotic mycoplasma pneumonia in children. Methods: Clinical data and imaging findings of 17 children with clinically confirmed necrotic mycoplasma pneumonia were analyzed retrospectively. Results: The imaging findings of all the patients were pulmonary substantial infiltration and necrosis, including single lobe involvement in 9 patients and 2 or more lobes involvement in 8 patients. Nine patients had cyst-like formation, 15 combined with pleural effusion. Lung infiltration and liquefaction necrosis reduced or absorbed in all the patients, 2 had bronchiectasis in following up. Conclusion: Necrotic mycoplasma pneumonia of children shows substantial infiltration of the lungs and necrosis, cavity formation, pleural effusion and pleural thickening.