“线在几何学上指一个点任意移动所构成的图形:直线、曲线、线条。”这是线在《现代汉语词典》中的一种解释。线是艺术元素的一个基本单位,它是具有一定的长度,并有其宽度与粗细的客观对象。不同形式的延伸作为基础形成了线不同的艺术表达形式。线在艺术上的功能是非常强大也是非常重要的,它能简单明了的表明任何事物的客观形象并非常的具有表现力。线不仅能在客观事物的尺寸、形态、空间结构上给人带来简单明了的信息, “Line Geometrically refers to a point composed of any moving graphics: lines, curves, lines.” This is the line in the “Modern Chinese Dictionary” in an explanation. Line is a basic unit of art, it is a certain length, and has its width and thickness of the objective object. Different forms of extension as a basis for the formation of different lines of artistic expression. The function of art in the art is very powerful and very important. It can clearly and simply show that the objective image of anything is very expressive. Lines not only provide simple and clear information on the size, shape and spatial structure of objective things,