Formal beauty: form needs a sense of lines, beauty and a feeling that people like at first sight. It can refer to the curved shape of a person, the shape of a work of art, and the shape of a garden plant. The aesthetic feeling of human body is based on the formal supervisor's demand for human social value. Due to the different subjective needs of people, the formal beauty of human body is mainly divided into talent beauty, sexy beauty and modal beauty. Most garden plants have their unique natural beauty. Some are vigorous, some are graceful, some are quaint and handsome, some are tall and straight, and some are swaying. For example, crowns are spherical, tower-shaped, umbrella-shaped and cone-shaped, which can be described as varied.