The language of amateur writing has distinct authentic features, manifested in everyday colloquial forms, dialogic language mechanisms and the linguistic traits of identity narration. Authentic language eliminates excessive meaning attachment and thematic compulsion, presenting the objective, neutral and dispassionate linguistic features of "zero-degree narration". By employing the theory of "zero-degree narration" to examine the linguistic features of amateur writing and explore the social factors underlying the formation of its language, this paper holds that the authentic language of amateur writing originates from the identity attributes of amateur writers, is influenced by the concept of writing power equalization, caters to the communication demands of the self-media era, and inherits the linguistic experience of New Realist Literature. Furthermore, it develops the "simulative" language of New Realist Literature into a "truth-as-it-is" language, thereby highlighting its linguistic authenticity.