The invention discloses a method for cultivating rice. The method comprises the following steps: ploughing a paddy field, improving the soil with fermented organic fertilizer, transplanting rice seedlings, managing with water, using rice chaff, corn straw powder, leaf powder, beanstalks, crushed corn and pyroligneous acid for killing weeds and insects, harvesting rice and the like. After the proper organic fertilizer is put into the soil, the fertile soil with high organic matter content, few weeds and no pollutants is obtained and suitable for organic cultivation of rice, and the improvement time is short; and as rice chaff, corn straw powder, leaf powder, beanstalks, crushed corn and pyroligneous acid are used for killing weeds and insects, the weeding cost is low, the weeding effect is complete (more than 90 percent), no pesticide residue is left, and the final quality of rice is ensured.