In the parental propagation of dual-purpose genic male sterile lines of rice, the occurrence of volunteer rice poses a greater risk to seed purity. Through the analysis of the causes of volunteer rice and the damage to the parent seeds, combined with the current situation of agricultural production in Baoshan, we proposed the following measures, including innovation crop planting models, doing a good job in variety layout plan, strengthening the management of previous crops, promoting centralized seedling raising technology, irrigating before planting to promote germination, and taking strict measures to remove impurities in the field, etc, to prevent the occurrence and harm of self-grown rice, ensured the seed purity of rice.