Abstract: With the material of 150 new varieties of dry resistance gene convergent cross generation, the milling quality diversity and correlation are analysed between dry-cultivate and water-cultivate. The results are as follows: dry-cultivate lower the rice milling quality, lower the head rice most, then the milled rice, lower the brown rice slightly. With the increasing of brown rice and milled rice, the diversity of dry-cultivate and water-cultivate becoming more. The head rice diversity is relatively stable. From the results we can see there are some variety lines has good dry resistance, their dry-cultivated milling quality are equal or better than that of water-cultivated. And those lines normally has good dry resistance. They can be used to use widely.