The invention discloses a method for culturing cabbage type rape with long ornamental period by collard. The method comprises steps of hybridizing a regular oilseed rape type with various collards; performing double cultivation on a culture base containing 20 mg/L colchicine at a F0 seed obtained through distant hybridization; after seedling, rooting and transplanting to a big farmland; if the hybridized F1 contains target characteristics, continuing the backcross transformation with cabbage type rape; after the backcross descendant reaches the characteritics of the cabbage type rape, quickly and stably performing microspore culture when the fertility is normal; hybridizing various leaf colour materials with successful transformation with cabbage type rape, selecting a new type of cabbage type rape with different leaf and flower colors; matching and planting new types of various cabbage type rape with different leaf and flower colors to meet people's demand of enjoying leaves in winter and flowers in spring. Through distant hybridization, related gene of collard leaf color is transferred to the cabbage type rape; meanwhile, through the combination of leaf color and flower color, the ornamental period of the ornamental oilseed rape is prolonged.