Abstract: Sweet potato-mung bean, a new varfety, had been acquired by grafting between these two plants where the sweet potato was as stock and the mung bean as scion. Compared with the original mung bean, there were many obvious changes in this new variety: Thousand-grain weight increased 94.4%, the carbohydrates content increased 12.8%;the protein consent decreased 0.3%;the yield increased 14-56%. Beside this, the shape of plants, the form of pollen grains and the starch grains as well as the number of chromosome were also different. This investigation indicated that it is possible to acquire a new variety by means of distant grafting.

Key words: Mung bean, Sweet potato, Grafting