Stance is related to the author’s evaluative attitude towards the knowledge conveyed in academic discourse, which is an important criterion for judging the objectivity of knowledge expression. At present, previous reviews on stance markers in academic discourse have mainly focused on analyzing the current state of relevant research from multiple perspectives at a macro level, and there are few reviews of a particular research methodology. In view of this, this paper synthesizes the current research trends with a focus on the comparative study of stance markers in academic discourse so as to find out the research gap and then shed light on possible future research.