Abstract: 【OBJECTIVE】Centering on the two crucial factors yield and quality in producing seed of hybrid rice, improving and integrating the technique of high-yield producing seed of hybrid rice to form a set of standardized technical system of stable high-yield and large-area balanced increasing-yield of large-scale producing seed in Hainan winter of hybrid rice is especially necessary【METHOD】Taking zhongjiuyou801, a new indica hybrid late season combination as example, according to the large-scale producing seed practice, the key technique of large-area balanced high-yield and better quality seed of hybrid seed production in the winter of Hainan were summarized【RESULTS】They include selecting best plot of producing seed, making March 25th around as the best heading flowering, using different age as the main basis of the lag period of parents and the leaf drop, fostering more tiller seedlings, strengthening paternal management, managing to promote maternal to grow quickly in early, constructing better out-crossing groups owning the strong father and many mother directly, spraying gibberellin properly, driving powder scientifically, improving the field environment, controlling pest and pests damage, purifying strictly and harvesting timely to ensure the quality of seeds【CONCLUSION】These results can provide referential basis of large-scale producing seed in Hainan winter for other new combinations.