Project knowledge tree construction and retrieval method

The invention relates to a project knowledge tree construction and retrieval method. The method comprises the steps of traversing all folders and files of a project to construct a project directory tree; extracting features of each file of the project, wherein the features of each file comprise file features of the file and function features of each function in the file; constructing a project knowledge tree for describing the project by using a plurality of Json object arrays based on the project directory tree and the characteristics of each file of the project; and using a retrieval mode based on a project retrieval structure or a retrieval mode based on file features and function features to realize retrieval of the project knowledge tree through a Solr full-text retrieval engine. Through the method and the device, the fragments of the files and the file functions which are the same as those of the tested project can be quickly positioned, so that the carding association relationship is clearer, and the p