This essay analyzes the lens model and lens model equation in musical communication, and makes a comprehensive analysis on its meaning for college music teaching. In the course of playing, we can find out how the player make use of various or excess of clues to express his/her feelings by the analysis of lens model. In the meantime, we also can discover how audiences interpret player’s feeling based on these clues. In this equation, the linear regression can be used to connect the player and his/her audiences. Based on the lens model, mathematical model will also be used to improve the expression in the musical play. CFB is a kind of play feedback for the player when the play ends, and this clue will be compared with the clues used by viewers to maintain consistency between these two clues.