The invention provides a method and a device for identifying video clips. The method includes the following steps: extracting the knowledge point label of each video clip contained in a teaching video to get at least one knowledge point label; classifying a target test question by knowledge point based on the knowledge point labels of the video clips and the subtitle information of the video clips to get at least one category of test question group, wherein the target test question is a test question belonging to the teaching video, and different categories of test question groups correspond to different knowledge point labels; determining a target knowledge point corresponding to a target knowledge point label in the knowledge point labels based on the answer result of each test question group acquired, wherein the target knowledge point is a knowledge point above a preset difficulty in at least one knowledge point; and taking the video clip corresponding to the target knowledge point among the video clips as a difficulty clip. The technical problem that the method in the prior art is of low precision and slow in difficulty identification is alleviated.