The invention discloses a cultivating method of strong arabidopsis seedlings. The method includes the following steps that filter paper is put in a culture dish, after the filter paper is soaked in clean water, arabidopsis seeds are put on the filter paper, and the filter paper is put in a refrigerator to be vernalized for 2-4 days at the temperature of 3-4 DEG C; the vernalized arabidopsis seedsare sown in nutrition bowls with a seedling culture medium soaked in clean water with a toothpick; 5-6 arabidopsis seeds are sown in each nutrition bowl, the nutrition bowls are covered with preservative films, the nutrition bowls are put in a stainless steel iron pan, then the stainless steel iron pan is put in a culture container to be cultured for 15-20 days, then the preservative films are removed, culture continues for 5-7 days, 4 seedlings with good growth vigor are reserved, and the other seedlings are picked off. After sowing is completed, culture is carried out for 3-4 weeks under condition of the photoperiod of 10-hour illumination and 14-hour darkness, then culture continues under the condition of the photoperiod of 16-hour illumination and 8-hour darkness, and the strong arabidopsis seedlings are obtained. Common materials are adopted, the cultivating steps of arabidopsis are simplified, the cost is reduced, the time is shortened, and the strong seedling rate of the arabidopsis is increased.