As a key figure of root-seeking literature, Han Shao-gong makes full use of Russian formalism theory of unfamiliarity in his proses, filling with philosophy color by his unique language. The rhetoric art of language unfamiliarity in his proses mainly includes the extraordinary collocations of attributive words, subject-predicate words and verb-object words, the syntactic structures of expatiation and exhaustion, compound sentence variation and cognate recurrences, as well as color variation and speech optimization of figures. The use of unfamiliarity techniques enhances the tension, making Han Shao-gong''s proses have deep and powerful meaning and profound and far-reaching mood.