Abstract: Music theme’s developing styles contain repeat,expansion and contrast.The opposition & unity in the developing of music theme are that of repeat,expansion and contrast and that in their internal. Develping styles,just as repeat,expansion,are mainly to associate the theme and the following developing part in many music elements just like tone,rhythm,to unite the music style in all.Music theme’s developing styles are various,but their characteristics are based on the two principle:opposition & unity.

Key words: music theme, developing style, opposition, unity