Abstract: In 2006, four rice varieties including "Nongliangyou 3155", "Heliangyou No.1", "Chunyou 927" and "Yongyou 12" were introduced, and a comparison test of new middle-season hybrid rice varieties was carried out in Shitun Town, Zhenghe County with "Yongyou No.9" as control. The results showed that growth period of all tested varieties was between 139 and 154 days and yield per 667 m² was between 554.28 and 670.78 kg. "Nongliangyou 3135" and "Liangyou No.1" had good comprehensive characteristics and could be further extended in Zhenghe County.