| The COVID-19 outbreak in 2020 has spread to all parts of the world at an extremely fast speed,bringing great impact on the production and life of people all over the world.At the beginning of the outbreak,China took active measures to protect the lives of our people to the greatest extent possible,a policy that resulted in significantly lower infection and death rates than abroad and a rapid resumption of production and work.However,with the normalization of epidemic prevention and control and the flattening of epidemic prevention and control abroad,the policy of "dynamic zeroing" chosen by China has also caused certain obstacles to the normal working process of accounting firms.On March 20,2020,the Association issued the "Guidelines on Auditing in the face of COVID-19",which relaxed the requirements of relevant auditing procedures and gave warnings on auditing risks,which was of great guiding significance at the beginning of the outbreak.This paper,from the shallow to the deep,first discusses the mechanism of the impact of COVID-19 on audit quality,takes all the listed companies excluding ST and financial institutions as samples to discuss the overall impact of COVID-19 on audit quality,and then takes A accounting firm as an example to further study from the perspectives of audit input,auditor psychological status,the industry of the audited enterprise,and finally draws relevant conclusions.First,The COVID-19 outbreak has reduced the quality of auditing by accounting firms.Secondly,with the outbreak of the novel coronavirus,audit quality has decreased and audit input has increased.Finally,the audit quality fluctuates more in industries that are heavily affected by the epidemic.Both rapid development and business damage will lead to a significant decline in audit quality.As one of the big four accounting firms,A accounting firm has always served as A good benchmark in the audit industry in our country.Its application of new technology,strict control of audit quality and measures in response to the novel coronavirus outbreak are worthy of reference for other domestic accounting firms.Choosing A accounting firm as the study object,the conclusions obtained are also more guiding significance.Although China has completely opened to the COVID-19 pandemic in last year,the difficulties,setbacks and measures taken by accounting firms during this period are still worthy of our discussion.At the end of the paper,this paper gives opinions on the problems faced by accounting firms,expecting them to constantly improve themselves,enhance their operational stability,and be able to face more uncertainties in the future. |