社会用语是指为公众广泛而频繁地用于各种公众场合的用语，承担着多种社会交际任务，可依据其使用场合和媒体、使用者公众形式和完成的交际任务等分类。虽然社会用语是一个复杂庞大的用语集，但其基本特征是十分清晰的，它们是：公众性、功利性、多元性、能产性、创新性和简明性。本文以社会语言学和社会学有关理论为依据，以具有普遍性和代表性的社会用语为例证，分别讨论这六个基本特征。 Social terms refer to terms that are widely and frequently used by the public in various public occasions and undertake a variety of social communication tasks. They can be classified according to their use cases and media, the public form of users, and completed communicative tasks. Although social terms are a large and complex set of terms, their basic characteristics are very clear: they are public, utilitarian, pluralistic, productive, innovative and concise. Based on the theories of sociolinguistics and sociology, this essay takes the social terms of universality and representativeness as examples and discusses the six basic features separately.