Abstract: Under the new situation, major changes in the external social environment, especially the wide application of new technological means and teaching ideas are bringing about the continuous reform of teaching mode and spawn a new online teaching ecosystem. Taking the course "Information Resource Retrieval" as an example, this paper analyzes the problems of online teaching mode selection, teaching process management and curriculum ideological and political construction, and puts forward three important and feasibility ideas for the teaching reform -- embedding at the macro level, thematic at the middle level and mixing at the micro level in order to provide some reference and basis for the online teaching reform of related courses in colleges and universities.

Key words: Information resource retrieval, Course teaching, Online teaching, Teaching reform