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Purpose: To analyze the clinical data of oral emergency cases and the characteristics of oral emergency diseases, and provide clinical basis for improving the quality of oral emergency treatment and making reasonable arrangement., Methods: A total of 137 740 patients in oral emergency department from January 1st, 2017 to December 31st, 2018 were collected and analyzed retrospectively according to gender, age, time of visit and diagnosis. The results were analyzed with Chi-square test by Excel 7.0 and SPSS 19.0 software package., Results: The ratio of men and women was 1.13:1, with an average age of 35.71 years. The highest incidence was seen in October 2018, and the lowest was in February 2017. The peak time of oral emergency was 20:00 to 21:00. The top three disease entity were maxillofacial injury (29.17%), facial infection (26.95%) and pulpitis (10.08%)., Conclusions: There is a wide range of diseases and a large number of patients in oral emergency and the visiting time is relatively concentrated. Dentists for emergency need to master the professional knowledge of oral surgery and endodontics. In order to make precise strategies to formulate the scale of oral emergency, considerations should be taken with the changing features of the period and month of oral emergency treatment.