音乐旋律提升主题感染力。在信息传递、意义接受过程中，音乐是影像作品不可

The musical melody enhances the appeal of the theme. In the process of information transmission and meaning acceptance, music is one of the artistic modeling methods that cannot be ignored in video works. Specifically, it expresses emotions and conveys emotions while bringing the audience a beautiful enjoyment through a certain rhythm. The rational use of music in police documentaries can enhance the taste of the work, and at the same time, a few impassioned or warm and moving melodies can play a double role in expanding the meaning, highlighting the meaning and strengthening the expression.

Musical melodies enhance the infectiousness of the theme. In the process of information transmission and acceptance of meaning, music is one of the artistic modeling means that can not be ignored in video works. Specifically, it through a certain rhythm, in bringing the audience the enjoyment of beauty at the same time to express emotions, the transmission of emotions. The rational use of music in police documentaries can enhance the interest of the work, while a few paragraphs or impassioned or gentle moving melodies can do more with less in terms of connotation expansion, significance highlighting and enhanced expression.

Music melody enhances theme appeal. In the process of information transmission and meaning acceptance, music is one of the artistic modeling means that can not be ignored in image works. Specifically, through certain rhythm, it can bring the audience the enjoyment of beauty and express emotions at the same time. The reasonable use of music in police documentary can enhance the interest of the work. At the same time, some impassioned or warm and touching melodies can play a multiplier effect in expanding the connotation, highlighting the significance and strengthening the expression.