In a multicultural context, how to achieve effective communication, ensure accurate information transmission, and overcome communication obstacles caused by cultural differences have become pivotal issues faced by modern organizations. To delve into the role and impact of effective communication in complex organizations concerning cultural differences, this study employs a multifaceted research approach. Initially, through a literature review, we formulated research questions and sorted out relevant theories and findings from previous studies. Subsequently, this research qualitatively analyzes three effective communication techniques -- cross-cultural communication training, the establishment of effective feedback, and the use of remote virtual communication tools, exploring their efficacy in resolving communication barriers induced by cultural variances. Additionally, this study cites practical cases to substantiate the effectiveness of these communication techniques. By integrating these three techniques, this paper aims to offer organizations a practical communication strategy, assisting them in effectively tackling challenges posed by cultural differences in intricate environments.