Abstract: Adobe Illustrator can be used to draw the plant structure in the experiment of plant biology. Transverse section of leaves, anther and ovary are not circle in shape. Creating a new pattern brush is a good tool for drawing their structure. New pattern brush can draw a lot of epidermis and palisade cells in short time. Creating a new pattern brush make drawing plant structure easily and quickly. We use the transverse section of lily ovary as an example to introduce how to create a pattern brush and use it to stroke.

Key words: Adobe Illustrator； pattern brush； ovary, drawing