The invention provides a demand response safety access method based on role driving in a smart power grid. An authentication module, a data acquisition module, a data analysis module and a safety control module based on roles are mainly comprised. According to the method, after an access request is initiated by a demand response body, safety certification based on a one time one secret algorithm is carried out for an access body; after certification, the active or passive data acquisition technology is utilized to carry out data acquisition for network equipment of the access body and communication; noise (abnormal data) of the acquired data can be eliminated through utilizing a clustering algorithm during data analysis, the data after processing and the information of other bodies in role types are associated and analyzed; role distribution for the access bodies is carried out by the safety control module based on the roles according to the association analysis result, authority for performing certain operation is granted to protected systems and data resources, and the demand response safety access process based on role driving is accomplished.