The invention discloses a method for accessing log data of multiple data sources, which comprises the following steps of: organizing the log data of each data source according to a preset tree structure; receiving a data access request from a user and generating a data positioning string according to the access request of the user and the tree structure; resolving the data positioning string to determine the access interface and data object path of the data source to be accessed; acquiring data description information and data volume information of a data object according to the access interface and data object path of the data source; and performing data resolution on the data volume information to generate an access result according to the data description information of the data objectand the stored definition information of a data model.