Female softshell turtle: short and wide carapace, flat plastron with no depression in the center, thin and short tail, thin tail base, cloaca near the rear edge of plastron, two anal shields formed on plastron The notch is shallower and the notch angle is larger.

Male soft-shell turtle: carapace is long and narrow, and the center of the plastron is slightly Inwards, the tail is thick and long, the base of the tail is thick, the cloaca is far from the rear edge of the plastron, and the two anal shields of the plastron have deep nicks and small notch angles.