平台包络是指在原始市场具有市场力量的平台进入另一个与原有的产品和服务不同的、新的目标市场，其中并购是包络的常用手段。平台包络可能带来促进市场竞争、推动产品升级和技术革新、增加消费者福利以及实现范围经济和规模效应等积极影响，但同时也可能加强包络者生态系统的主导地位，促使包络者实施捆绑销售、隐私政策捆绑、自我优待和市场封锁等危害竞争的行为。但目前的反垄断法在规制包络型并购上存在困难：营业额申报门槛难以规制初创企业并购；现有的竞争损害评估框架难以评估初创企业并购的潜在竞争损害；辨别扼杀式并购和包络型并购存在难题；审查机构调查成本高，举证责任过重。对此，建议在申报层面引入交易额等申报标准。在审查层面借鉴域外的并购分类审查模型；引入动态视角和数据、用户、技术等非价格因素综合评估；适当调整举证责任分配。此外还可以借鉴欧盟的“守门人”制度、德国的“跨市场影响”认定规则等，为超级平台设定更高的义务，防范生态型垄断。

Platform envelopment refers to the entry of a platform with market power in the original market into another target market, which usually occurs when a digital enterprise enters a new field different from its original products and services. And acquisition is a common means. Platform envelopment may bring positive effects such as intensifying market competition, promoting product upgrading and technological innovation, increasing consumer welfare as well as realizing scope economy and scale effect, but it may also strengthen the dominance of the enveloping ecosystem and inspire the platforms to conduct anti-competitive behaviors such as bundling, privacy policy bundling, self-preference and foreclosure. However, the current anti-monopoly law has difficulties in regulating the enveloping acquisitions: turnover declaration threshold is difficult to regulate startup acquisitions; the existing competitive damage assessment framework is difficult to assess the potential competitive damage of startup acquisitions; there exists obstacles to distinguish killer acquisitions and enveloping acquisitions; for the market regulatory departments the cost of investigation is high and the burden of proof is heavy. In this regard, it is suggested that at the level of declaration, introduce the transaction amount and other declaration standards. At the level of review, refer the oversea classification review model of startup acquisitions, and introduce dynamic perspective as well as non-price factors such as data, users and technology to evaluate comprehensively; adjust the distribution of proof burden. In addition, it will also be meaningful to learn from the "gatekeeper" system of the European Union and the "cross-market influence" identification rules of Germany to set higher obligations for super platforms, preventing ecological monopolies.