The invention discloses a method for culturing feed rape through distant hybridization. The method comprises the following steps: hybridizing the conventional rape variety and an intergeneric material; performing double culturing on distant hybrid F0 seeds into seedlings, and then transferring the seedlings to a field; investigating agronomic traits of F1 plants in the field; bagging and selfing single plants F1 capable of selfing and fruiting, planting an F2 population, investigating agronomic traits of single plants in the F2 population, and bagging and selfing single plants with large biomass in the F2 population; continuing to backcross single plants F1 incapable of selfing and fruiting but having relatively large biomass with cabbage-type rape till selfing and fruiting can be achieved; performing microspore culturing on a low-generation material capable of fruiting and obtained through distant hybridization or backcrossing; investigating agronomic traits of a homozygous stable material; performing field population planting on a selected target material. With the method, a novel feed rape resource is created through distant hybridization, and a novel double-low feed rape material with large biomass, long vegetative growth period, strong regeneration capacity, and relatively fast growth at low temperature is obtained through intergeneric hybridization.