Igor Stravinsky is one of the most influential composers and the pathfinder of Neo-classicism in the twentieth century. In his Duo Concertante, there are many classical, baroque, or even Renaissance elements in the melodies and the musical structure. When composing the second and the third movement of Duo Concertante, Stravinsky was inspired by Carmen Bucolicum, a pastoral by the Renaissance poet, Francesco Petrarca. Hence, in this dissertation, I will discuss about the techniques Stravinsky used of blending the twentieth-century tonal harmonies into classical structure, and the ideas of conveying the literature meaning through the music. The first chapter is my motivation of writing this topic, and the researching methods;the second chapter is Stravinsky’s brief biography;the third chapter is the background and comparison between Carmen Bucolicum and Duo Concertante;the forth and the fifth chapter are analysis and interpretation of Duo Concertante.