Substantial signs of computational propaganda were discovered in the 2016 US presidential election and the 2022 Russia-Ukraine conflict. Multiple stake-holders have implemented intensive information interference and emotional manipulation in a series of ways，including big data micro-targeting，dissemination of misinformation，automated communication by social robots，virtual reality and so on. This study compared the specific strategies and means of computational propaganda in the above two events，and summarized the basic principle and the iteration pattern of computational propaganda in the era of intelligent communication. In the 2016 US presidential election，the primary strategies of computational propaganda emerged based on the combination of user analysis with big data and information distribution with automated algorithm. Substantive empirical evidence confirmed the effects of these strategies. In the 2022 Russia-Ukraine conflict，data-driven intelligent communication signified a new paradigm of public opinion warfare，and thus the necessity as well as the impact of computational propaganda were underscored therefore. The pattern of computational propaganda turned to systematic，weaponized，and automated ways. With the implication of underlying mechanism and empirical evidence，the iteration of pattern of computational propaganda responded to the transformation tendency of communication technologies and paradigms.