This dissertation focused to analyze Sun Di's (1081-1169) literary achievements from four aspects: poetry, four-six prose, ji prose, and epitaphs. We found that after the death of Ouyang Xiu, Su Shi, Huang Tingjian and other outstanding author in the Northern Song Dynasty, poetry and prose gradually suffered from "formalization". Poetry particularly focused to sentence rules, ignoring temperament; four-six prose are popular with "observance of the law", and ji prose and epitaphs also had paradigms. However, Sun Di could make a breakthrough.
First, Sun Di 's poetry was "light and open-minded", "novel and grand", and " well-plotted". It was similar to Su Shi, but not exactly the same as Huang Tingjian. Compared with the Jiangxi poetry group learned to Huang Tingjian was the mainstream Sun Di chose another creative path.
Secondly, Sun Di 's four-six prose was "exquisite" "powerful", and "novel" concocts from time to time. Sun Di had a good balance between Wang Anshi's "observance of the law" and Su Shi's "brilliant and powerful". Sun Di was different from those of the Four-six prose writer.
Thirdly, Sun Di 's ji prose liked to write "pianyu" ,"idioms", and "anecdote" showed that Sun Di was special writers.
Fourthly, Sun Di 's epitaphs often took the character under the "large background" to shape the personality of the character. And Sun Di 's was adept at depicting character’s strangeness. Sun Di 's also emphasizes tomb owner's abrupt and mysterious dead, which was different from many flat epitaphs.
In short, Sun Di’s poetry and prose were special between two Songs the uniqueness. His "powerful" creative style avoids the "formalization" and "redundancy". Sun Di had a certain meaning in the history of Song Dynasty literature.