[目的/意义] 随着比特币、以太坊等基于区块链技术的加密数字货币和新型分布式社群计算范式的兴起，越来越多的传统互联网项目可以利用区块链的链式数据结构、去中心化网络、安全机制重塑“数据”生产关系，有助于提高系统效用。旨在利用区块链技术为在线社交媒体平台赋能，建立具有明确经济激励的可信社群生态。[方法/过程] 通过基于用户信用值的自下而上集群“投票”，对平台“社区”用户的价值贡献进行量化，设计平台内容生产者内容评价者的激励机制，以激励内容生产者发布优质真实内容，内容评价者积极参与内容评价，同时抑制评价者合谋“投票”与鼓励评价者进行批判性思维的“投票”。[结果/结论] 通过数值分析与仿真验证所设计激励机制的有效性，最后基于以太坊区块链实现所设计的在线社交媒体平台。

[Purpose/significance] With the rise of encrypted digital currencies and new distributed community computing paradigms based on blockchain technology such as Bitcoin, Ethereum and etc, more and more traditional Internet project can use Blockchain's chained data structure, decentralized network, and security mechanism to reshape the data production, which is conducive to improving the overall utility of the system. This paper aims to use Blockchain technology to empower online social media platforms and build a trusted community ecology with clear economic incentives. [Method/process] Quantifying the value contribution of platform users through bottom-up cluster voting based on the users’ speech power, and then an incentive mechanism for platform content producers and content evaluators was designed to motivate content producers to post high-quality real content and content evaluators to actively participate in content evaluation, and it could also suppress evaluators from colluding to vote and encourage evaluators to vote critically. [Result/conclusion] Through numerical analysis and simulation, we verified the effectiveness of the designed incentive mechanism. Finally, we implemented the designed online social media platform based on Ethereum.