The Taiwan small-headed snake is thicker and fatter, with a total length of 550-673 mm. The head is short and small, indistinguishable from the neck.

The back of the Taiwan small-headed snake is brown or tan, and there are Many equidistant dark-brown horizontal wavy lines, with a very obvious scarlet narrow longitudinal stripe in the center, which may be pink or reddish-brown or reddish-brown; the ventral surface is dark pink or brownish-white, with fine brown on both sides Spotted, with lateral edges.