艰难梭菌是引起抗生素相关性腹泻和医疗机构相关性腹泻的重要病原，在欧美引起暴发流行，造成沉重疾病负担。然而我国艰难梭菌感染调查缺乏统一的诊断原则和检测技术规范，我国艰难梭菌感染率和疾病负担尚不明确。因此中国CDC传染病预防控制所联合全国其他11家单位撰写《艰难梭菌感染诊断（T/CPMA 008-2020）》中华预防医学会团体标准，以“合法性、科学性、先进性、可行性”为原则，给出了艰难梭菌感染的危险因素、诊断原则、诊断和鉴别诊断。旨在提高临床感染性腹泻中艰难梭菌感染诊断的准确性，指导监测工作开展，明确我国艰难梭菌感染的风险和疾病负担。“,”Clostridioides difficile is a key pathogen of antibiotic related diarrhea and hospital associated infection, causing several outbreaks in Europe and North Americans and resulting in severe disease burden. However, the standardized diagnostic principle and detection specifications in n C. n difficile infection (CDI) survey are limited in China, and the infection rate and disease burden of CDI in China are unclear. Therefore, National Institute for Communicable Disease Control and Prevention,National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, together with another 11 institutions, draft the group standard entitled “Diagnosis of n Clostridium difficile infection (T/CPMA 008-2020)” of Chinese Preventive Medicine Association. Based on the principle of “legality, scientificity, advancement, and feasibility”, this standard clarifies risk factors, diagnosis principles, diagnoses and differential diagnoses in order to improve the accuracy of CDI diagnosis in clinical practice, guide the surveillance for CDI, and understand the infection rate and disease burden of CDI in Chinan .