A method for cultivating seedlings is disclosed, which includes: preparing a seedling-raising field: select a flat concrete court, a flat clay land or artificial greenhouse; preparing bed soil: the soil is derived from parcel of rice fields, fertilizer and plant fiber are stirred in the soil, and sterilization is carried out; laying the bed soil: seedlings are raised by a seeding tray, or by a frame made on the seedling-raising field; treating seeds: seeds are dressed by adding a seed-treating agent in the seeds; sowing: the seeds are evenly distributed; managing water: when the seedlings are raised by a seeding tray, it is required as follows: sowing is carried out in the case of enough moisture, the seeds are covered in the case of optimum moisture, the moisture is kept by folding the tray, moisture is supplemented by covering, and water is controlled by uncovering; managing the fertilizer; and transplanting.