Abstract: by integrated analyse growth period, spacing high, effective ear, grain weight, seed rate, ect, aim high crop breed, so that ascertain japanca rice breeding seed best selection aim, and direct Guizhou japanca rice breeding seed afford reference, exploit Guizhou province japanca rice area experiment data. The result indicate that Guizhou japanca rice breed seed’s aim: growth period 165～170d，spacing high 95～105cm, effective ear 0.2701~0.350 million/hm2, each ear grain 100~140, seed rate 80% upward, and kilo grain weight 25~27 gram.