The crystal glaze of Zidingjie in Song Dynasty is characterized by frankness and boldness. The truthfulness of Song porcelain is more reflected in folk kiln porcelain. Most of its porcelain contents and patterns are closely related to life, pure and direct, with strong market flavor, but not rustic, leaving a kind of frank beauty. The boldness of Song porcelain is more reflected in the process of its artistic innovation. Ink calligraphy's integration into porcelain can break through the traditional ways of expression, and endow porcelain with aesthetic feeling and taste by painting, film opening and other forms. It shows the tolerance and openness of song dynasty's ideology and culture.