A new rapeseed TGMS line 402S has been bred through six years with seven generations by hybridization and systematic breeding. 402S possesses the similar thermo - sensitive male sterility to its female parent Xiangyou 91S which performed fertile, partially sterile and sterile throughout the flowering stage, and resembles its male parent Zhongshuang 4 on agronomic traits. And 402S has the double-low (low erucic acid and low glucosinolate) quality like its o nginal parents.