Objective: To explore the related characteristics and influencing factors of cough after novel coronavirus（COVID-19）infection. Methods: To investigate the relevant characteristics and influencing factors of cough symptoms after COVID-19 infection using online questionnaires. Results: According to the statistics of the survey data of this questionnaire, 1015 (90.9%) of 1116 valid questionnaires about whether there is cough or not had cough symptoms after novel coronavirus infection; Out of 1012 valid questionnaires regarding the timing of cough onset, 805 people (79.5%) began coughing within 5 days after infection; Out of 979 valid questionnaires on the issue of cough disappearance time, 640 people (65.3%) had cough symptoms disappear 14 days after infection；95.2% of patients with cough after COVID-19 infection had significant statistical significance (P＜0.01), and most of them had irritating cough with occasional small amounts of mucus; The statistical results of the impact of various factors on cough after COVID-19 infection are as follows: 1. There is a statistically significant impact of different genders, whether smoking/second-hand smoke, and whether medication is used on cough after COVID-19 infection (P＜0.05); The impact of a history of upper respiratory tract infection, basic lung disease, chronic cough, and COVID-19 vaccine administration within 2.3 months on cough after COVID-19 infection was not statistically significant (P＞or=0.05). Conclusion: Cough is one of the common symptoms after COVID-19 infection, It usually occurs within 5 days after infection, and the symptoms disappear after 14 days，Patients with cough after COVID-19 infection often cough up sputum, which is mainly irritating cough, occasionally accompanied by a small amount of sticky sputum, This study shows that gender difference and smoking/smoking second-hand smoke are the influencing factors of cough after COVID-19 infection; At the same time, most patients have been treated with different drugs for cough.