One of the important means of humanities innovation is the transformation of theory through interdisciplinary research. In this paper, Causal Implication Theory is used instead of implication theory, which carries paradoxes of implication, is the transformation of the research horizon, the transformation of theory, thus forming a new starting point of theoretical thinking. While paradoxes of implication gives rise to uncertainty of the inference mechanism of Grice’s and Neo-Grice’s, Causal Implication Theory stresses the specific causal relationship in one specific event, which is constrained by certain context and the speaker’s orientation, thus bringing about specific result out of the specific reason. In other words, one result corresponds exactly to one reason, thus Causal Implication Theory bringing certainty to the inference mechanism to such an extent that implication. In so doing, the old topic, the study of conversational implicature, is given new vitality.