Virtual　human　is　widely　employed　in　various　industries,　including　personal　assistance,　intelligent　customer　service,　and　online　education,　thanks　to　the　rapid　development　of　artificial　intelligence.　An　anthropomorphic　digital　human　can　quickly　contact　people　and　enhance　user　experience　in　human-computer　interaction.　Hence,　we　design　the　human-computer　interaction　system　framework,　which　includes　speech　recognition,　text-to-speech,　dialogue　systems,　and　virtual　human　generation.　Next,　we　classify　the　model　of　talking-head　video　generation　by　the　virtual　human　deep　generation　framework.　Meanwhile,　we　systematically　review　the　past　five　years＇　worth　of　technological　advancements　and　trends　in　talking-head　video　generation,　highlight　the　critical　works　and　summarize　the　dataset.