Yu Zhenfei was born with a good voice. Pay attention to "word, sound, spirit and festival" when singing, create a singing style that pays attention to rhythm and charm, and develop the singing style of "Yu School". There is a unique pursuit of singing, reciting, writing, using gas and transmitting sound, forming a refined, elegant and bookish performance style. He is proficient in poetry, calligraphy and painting, good at playing the flute, and has high attainments in flute style, fingering, harmony and luck.

During his 70-year stage career, Yu Zhenfei not only introduced the special performance means of singing and dancing in Kunqu Opera into Beijing Opera, but also introduced a strong "bookishness" into Beijing Opera performances, enriching Beijing Opera students and their parties. At the same time, the lively and vigorous style of Peking Opera was introduced into Kunqu Opera, which promoted the exchange and improvement of the two operas.

Young students in Yu Zhenfei distinguish between heroic elegance and dissolute pride, charming and superficial lightness in singing voice and emotion, bearing of performance, amplitude and rhythm of action. In his aesthetic thoughts, vulgarity in elegance and elegance in vulgarity have formed an unattainable height for his performing arts. Zheng Peikai, a professor at the City University of Hong Kong, said: "Mr. Yu has brought the very profound cultural connotation inherited from his family studies to traditional drama. This is like the cooperation between scholars and professional actors, and there is a profound cultural connotation behind it. " Xiao Sheng played by Yu Zhenfei, especially the role of towel boy, is called "elegant towel boy" because of its elegant and fresh style.