Abstract: For choosing suitable summer-planting adzuki bean crop, this experiment adopted the method of indoor petri dish bioassay to study the allelopathy effect of adzuki bean, radish, cabbage and wheat under different concentrations of adzuki bean root aqueous extracts. The result showed that the adzuki bean had a strong inhibition towards its germination rate and germination index. With the increasing of adzuki bean root aqueous extracts concentration, the seed germination rate and germination index of the three kinds of receptor crops presented a decreasing trend. From the root length, young leaves length, the number of lateral roots, plant height, fresh weight and other forms indicators of seedlings, it was concluded that with the increase of adzuki bean root aqueous extracts concentration, only wheat presented a promoting effect while the other two kinds of receptor crops show inhibitory effect, which were not significant at low concentrations. With the increase of adzuki bean root extracts concentration, the SOD and POD activity of radish and wheat also increased, but the two kinds of enzyme activity of cabbage showed a decreasing trend. The MDA content in seedlings of radish and wheat decreased, but the MDA content in cabbage increased significantly, which showed that receptor crop wheat could be used as rotation crop of adzuki bean, radish also had a great application potential in adzuki bean crop rotation.