海外投资是资本输出国的投资者在国外以资金、实物、知识产权等进行的投资，由此推知，海外数字投资是以数字化的资金、实物、知识产权等进行的海外投资。一方面，中国海外数字投资以数字化的实物——通信网络、算力和智慧基础设施为主；另一方面，又以非实物的数据作为重要投资标的。中国海外数字投资呈现由早期模仿、跟随美欧到局部反超的转折态势。美国频繁滥用国家安全对中国海外数字投资进行制裁正是对这一变局备感焦虑的标志性反应。该制裁有悖于倡导数字向善、破解数字鸿沟、消除数字歧视、抑制数字霸权、维护数字安全等数字正义理念。为了有效应对，需完善《反外国制裁法》的反制措施，推动中国双边投资协定范本将海外数字投资纳入投资定义，优化海外投资保险制度并充分利用多边争端解决机制。

Overseas digital investment is made with digital capital, physical property, intellectual property and so on. On the one hand, China's overseas digital investment mainly focuses on digital physical objects, namely communication network infrastructure, computing power infrastructure, and smart infrastructure. On the other hand, China's overseas digital investment also uses non-physical data as an important investment subject matter. China's overseas digital investment presents a turning trend from early imitation, following U.S. and Europe, to partial anti surpassing. As a symbolic response to anxiety about this change, U.S. frequently abuses national security to impose sanctions on China's overseas digital investment. These sanctions violate the concept of digital justice that advocates for digital goodness, breaks the digital divide, eliminates digital discrimination, suppresses digital hegemony, and maintains digital security. In order to effectively respond, it is necessary to improve the countermeasures of the Anti-Foreign Sanctions Act, promote the inclusion of overseas digital investment in the investment definition of China's bilateral investment agreement model, optimize overseas investment insurance system, and fully utilize multilateral dispute resolution mechanisms.