Auto-filling method and device of northbound FTP (File Transfer Protocol) performance file for telecommunication network management system

The invention discloses an auto-filling method and device of a northbound FTP (File Transfer Protocol) performance file for a telecommunication network management system. The method comprises the following steps of: setting the granularity state of granularity of performance data according to the reported time of the performance data from a foreground network element by a performance loading module of the telecommunication network management system; when the performance loading module receives information reported subsequently by the foreground network element, wherein the information contains the performance data, if judging that the granularity of the performance data is in a completed state according to the set granularity state, then sending filling information containing the performance data to a northbound FTP performance module; and carrying out the processing that the performance data is filled to a previously generated northbound FTP performance file with the granularity by the northbound FTP performance module according to the filling information. Through the auto-filling method, the information reported by the foreground network element is analyzed to judge whether the northbound FTP performance file is complete or not, and the auto-filling of the performance data is carried out when the judgment result is that the northbound FTP performance file is incomplete.