The invention relates to the technical field of teaching quality evaluation, and discloses an English teaching quality evaluation method based on a
knowledge graph, and the method comprises the steps: collecting the voice, text, examination
score and interactive behavior data of a student; extracting phoneme accuracy, intonation curves and fluency indexes from the
voice data, performing subject-predicate-
object structure recognition and
logical relationship labeling on the text data, and
processing score and interaction data to form a preprocessed
data set; establishing a
knowledge graph containing vocabularies, grammar,
semantics and communication strategy elements according to the preprocessed
data set, and generating an element evolution trajectory; mapping the data to
knowledge graph identification semantic isolated points and logic interruption points to form a teaching quality factor group; and correcting the factor group, generating a change process, generating an early warning level according to the trend and the element redundancy, and finally outputting an
evaluation result. According to the invention, comprehensive, dynamic and traceable evaluation of English teaching quality is realized through the knowledge graph.