Abstract: The writer’s creation style, as well as the writer’s own personality characteristics, life experience, social environment will have an inevitable influence on its poetry style, the poet creation of geographical space from the perspective of literature geography, and regional climate characteristics will also affect the poet’s creation theme and poetry style of different degrees. Yu Xin, a famous poet in the North and South Dynasties, has special cross-regional space creation experience. Yu’s poetry creation style is“beautiful and light, changing his poetry creation style from the south to the north to“melancholy and sad. His poetry creation style presents great differences in style among the many reasons for the change of Yu Xin’s poetry creation style, and the influence of the geographical environment on the change of his poetry creation style cannot be ignored.

Key words: Yu Xin, literary geography, cheery light, depressed and sad