This paper made an identification about six agronomic trait of Yihui 1577 including lemma hair, phenor reaction, the first and second internode's length, the hull color while heading, leaf hair and grain shape with the morphological index method founded by Prof. Chen Kansheng. This study has proved Yihui 1577 belonging to japonicalinous restorer line. Yield combination analysis of Yihui 1577 was made by partial complete double cross design with 4 CMS lines and 6 restore lines. The result showed that the general combination ability effect value of Yihui 1577 and Minghui 63 was 0.226 and -0.113, indicating Yihui 1577's general combination ability was prior to Minghui 63's.