The average body length of the green snake is 75-90 cm, and the maximum can reach 120 cm. The back of the body is grass green, the mandible, throat and abdomen are yellow-green, and there are green spots on the edge of the mandible and the chin groove. Young green snakes have black spots on their bodies.

The green snake has a slender body, medium size, oval head, slightly pointed head, large scales on the head, large eyes, smooth and shiny body, body color It is dark green, yellow-green, or emerald green, but turns blue after death or dying. The ventral surface of the head and the front ventral surface of the trunk are light yellow and slightly green. They are good at hiding their whereabouts with their body color to protect themselves, and they will run away quickly in the event of a crisis.