Vocal music teaching is an integrated subject combining sound producing skills, mentality and language, so students should pay attention to the cooperation between sound organs. Inharmonious training of sound producing will make fragmentary and mechanical sound production. This paper begins with the analysis of counteraction and harmony between sound organs, and their relationship with the singer's mentality. It lists the influencing factors for producing harmonious and unified sounds, enphasizing integrative and progressive sound production training, to cultivate students' producing harmonious and unified sounds.