The perceptual ability in musical expressiveness is mainly reflected in the corresponding playersundefinedcommunication An emotion expressed by a particular mental activity. Playing piano music In the process, the player mainly refers to the students, want to play through the piano interpretation To produce perfect emotion, we must accurately judge the elements of music. In particular In this process, students should also have their own understanding of music works, can enough to further improve the work through the music knowledge learned. In the music table In the present force, the perceptual ability we speak of is equivalent to our ability to perceive a person and a person Things, according to his performance to feel its inner mood and state. Music Knowledge Itundefineds the same principle that art majors use their own music Knowledge, to feel the meaning of the work further, in the process can also use no The same instrument, the different playing speed, will play the emotion which the player wants to express heartily to deduce out, to form the style of playing works.