本文从物理的角度出发,分析线形成的方式及作用。通过对古今中外画家、学者关于线的评述的归纳,认识中国书画线形变化的演绎发展。中国书画线形的长短、粗细、干湿、浓淡、疏密、曲直起伏的变化,犹如音乐中的七个音符,看似简单,组合方式却无穷无尽,体现出独特的艺术韵味。 This article from the physical point of view, analysis of the formation of the line and the role. Through the induction of the comments by the painters and scholars at all times and in all over the world, the author understands the deductive development of the linear change of Chinese calligraphy and painting. Chinese calligraphy and painting linear length, thickness, wet, shade, density, ups and downs of the changes, like the seven notes in music, seemingly simple, but endless combination of ways to reflect the unique artistic charm.