Abstract:Objective：To analyze and compare the epidemiological and clinical characteristics of COVID-19，and to provide scientific basis for the development of emergency diagnosis and treatment strategies and response measures for emergency department. Methods：By referring to relevant literatures，the clinical characteristics and special inspections of COVID-19 were summarized and analyzed，and the classification and triage of the emergency department of the Second Affiliated Hospital of Nantong University under the epidemic of new crown virus pneumonia were discussed. Results：（1）Fever，fatigue，and cough are common symptoms of coronavirus-induced diseases. COVID-19 may be atypical in early symptoms；（2）focus on white blood cell count，neutrophil count，neutrophil count / lymphocyte Changes in the index，C-reactive protein / mean platelet volume，CRP and erythrocyte sedimentation rate，and N/L count ratio are independent risk factors for critically ill patients；（3）pay attention to the imaging changes of gound-glass opacity differentiation from early lung tumors；（4）Coronavirus pneumonia nucleic acid detection may be inconsistent with imaging results，Pay attention to laboratory quality control work；（5）Emergency pre-trial triage should not focus too much on fever symptoms，and carry out effective grading and stratification Prevention and control management to effectively prevent personnel gathering. Conclusion：The emergency department’s protection should not be lazy，early identification of patients with non-fever new coronavirus pneumonia can reduce missed diagnosis and misdiagnosis.