Abstract: For studying the potentiality of the materials of double-low, high yield, high oil content from Germany as parents , an incomplete dialer cross was made by using 13 rape lines (B.napus L.)from Germany as femal parents and 6 lines as male parents. The combining ability (GCA and SCA)and genetic ability of 8 main agronomic characters were analyzed. The main results are as follow (1) GCA performance for 6 males was in the following order 042269>044130>05431-435>05421-425>042164>05416-420.The order for 13 female parents was De-3>De-2、De-16>De-1>De-6、De-23>De-18>De-7>De-25>De-30>De-8>De-20>De-10. (2)The best combination of SCA of yield was De-8×05421-425. And the fore three combinations of high yield were DE-16×044130，DE-16×042164 and DE-23×044130 in 78 combinations. (3) Genetic ability（h2B）of No. of pods per plant was highest .And lowest on weight -1000 seeds. De-3、De-2 and De-16 were good materials from field trial observe and statistic analysis.