Abstract: This paper reports a new method of early association breeding Brassica napus cytoplasmic male sterility three-line and breeding heterosis hybrids . The key points of the methods is hybrids or test cross hybridization screening to obtain sterile, maintain and restore the three basic materials . To the basic shape maintainer and restorer, screening by the diallel cross expriments.Selecting excellent paired lines, and to determine the good maintainer and restorer lines; to keep the effects and other material properties required to maintain the first round of screening, in order to restore the Department's interaction with the performance of the maintenance department for the second round of screening; use and maintain the system as a near isogenic (other than fertility outside) relationship to determine the excellent education and backcross transfer CMS, the final three lines supporting the achievement of good breeding, and formulated a strong combination of advantages. New combination of the methods used for breeding, bred 07G-7, 07G-11, 07G-4 and a number of fine-quality waxless marker combinations, Outstanding performance in different sites and levels of the test, showing a good prospect.