Neologisms in linguistics refer to words or phrases that have recently been created or invented or given new meanings to existing words based on specific social and cultural backgrounds, which shows the vitality and creativity of language to some extent. In today's world, Covid-19 has undoubtedly become a hot issue of global concern in recent years, and new words have come into being. During the Covid-19 pandemic, neologisms mostly appear in the form of nouns, adjectives and verbs, and they all involve common morphological processes such as compounding, blending, coinage, clipping, acronym, borrowing and lexical deviation. The emergence and development of the Covid-19 neologisms are the direct reflection of the pandemic. These neologisms play an important role in cooperation and communication among people around the world.