The article first explores the influencing factors of the international spread of micro-brief plays using the DEMATEL-ISM integrated model, calculates the centrality and causality of each influencing factor, and identifies the key influencing factors and their associations, and carries out a hierarchical structural analysis of each influencing factor. Establish the Bayesian model of international communication of micro-broadcasts, and inverse the most general causal chain of international communication of micro-broadcasts. The key influencing factors of the international communication effect of micro short dramas are: platform authority, perceived usefulness, subject plurality, presentation structure, attitude tendency, and the direct influencing factors are: content complexity, presentation structure, topic involvement, timeliness. Platform authority→subject influence→platform access→ perceived credibility→topic involvement is the most general causal chain of the international communication effect of micro short drama.
