In patients with suspected novel coronavirus infection, routine blood, lung CT, C-reactive protein, and nucleic acid detection tests are performed, characterized by normal total white blood cell and neutrophil counts but low lymphocyte counts. Pulmonary CT shows lamellar ground glass shadows in both lungs, and in severe cases, solid shadows. The nucleic acid detection test may be negative once, but in patients with high suspicion of neoconiosis, secretions should be taken from multiple angles for nucleic acid testing. If the nucleic acid test is positive, the case can be classified as confirmed. In addition, C-reactive protein and sedimentation are increased in patients with neocoronary pneumonia, some patients may have normal calcitoninogen, and some critically ill patients have increased troponin.