Feature database generation method and device as well as corresponding flow sorting method and device

The invention discloses a feature database generation method. The method comprises the following steps: extracting target flow corresponding to a target application; initially classifying the target flow under a preset dimension; extracting features from the classified target flow, and matching the extracted features with a saved history feature database in order to perform function prejudgment onthe target flow; generating an analysis tree specific to the target flow by taking each pre-judgment result as a branch; and generating a new feature database according to the analysis tree. The invention also provides a feature database generating device as well as a flow sorting method and device applying the feature database. Through adoption of the feature database generation method and device as well as the flow sorting method and device, the flow matching accuracy and efficiency can be optimized according to feature matching during flow sorting of the feature database. 本发明公开了种特征数据库生成方法，该方法包括：抓取目标应用对应的目标流量；对所述目标