Felix Mendelssohn, Felix Mendelssohn, BaTuoErDi (Bartholdy 1809-1847) is in the 19th century romanticism Germany renowned composer and pianist and conductor, is the first-class international repute music masters. His style is pure and fresh and smooth, beautiful great-great-great-grandson is known, elegant, which reflects the classical preciseness and romantic fantasy combining, contents and forms highly unified aesthetic principles. Composer and good learn from life and nature, therefore, the creation inspiration of music is known as Mendelssohn "lyric landscape master".5 the music in his symphony plays an important role in the creation, omni-directional reflects his creation and artistic style. In his symphony, reflects religious feelings and beliefs, personal feelings and exotic theme in art creation, techniques and styles, and aesthetic concept formed its unique aspects of style.This thesis to loosen the fourth symphony of Italy's as the research object, the works through in-depth analysis of the background, the musical theme, style, and ultimately interpret the real value of the work for the art and positioning. By introduction, text and conclusion. In the preface to subject to its significance, and the present research work about Mendelssohn, the topic of the innovations and research methods are summarized. Text is divided into five parts: the first part of his life, through which the experience in the history of its profound understanding turns, The second part of the five symphony of his creation and creative features Outlines, The third part of Italy symphony of the background and history, the research question manuscripts, The fourth part of Italy symphony of melody, theme, the content of the overall work analysis, The fifth part, picture, classics from the perfect and unified, Follow the classical tradition, romance, Structural balanced symmetrical, concise concise gimmick on three aspects the symphony of creation and artistic style. The Italy symphony of Mendelssohn made overall evaluation and historical orientation.Keywords: Mendelssohn, symphony, Italy symphony, music, art style