Abstract: The secondary vascular tissue in the stem of Actinidia arguta is made an exhaustive study by the author. The results are as follows: its wood is belongs to seri-ring porous wood, the bottom wall of vessel in the se-coridary xylem is sloping with scalariform perforation plates, wood parenchyma is numerous, it has not only apotracheal but also paratracheal, this discoveries and to the parenchyma type of Actinidiaceae; the wood rays are hetergeneous Ⅰ and Ⅱ, and it has linked rays. The sieve tube of the secondary phloem is the dicotyledon wood type, the sieve tube is with compound sieve plate without companion cell. As observing the secondary vascular tissue in the stem of A. arguta it is compared with the others in the genus Actinidia and determined, the type of the wood rays and wood parenchyma, it is the first to observe its secondary phloem that is dicotyledon wood type. This prvide the secondary vascular tissue of the Actinidiaceae with a new kind of anatomical material.