The ultra vessel structure of Zusanli point and non-point zone were observed with the method of ABS vessel cast form under electronic microscope. The observation proved that the ultra structures and their distributions of the vessel of Zusanli point and non-point zone were different. The observation leads to the conclusion that the trend and distribution of vessel in the point zone play an important role. The ultra stereostructure in point zone is one of the basic forms of points in producing effects.