The invention discloses a method for planting pecan seedlings. The method includes steps of 1), preparing soil, to be more specific, selecting mountainous regions with fertile lands, loose texture and excellent drainage, removing weeds and smoothing the lands; 2), carrying out planting, and to be more specific, excavating planting holes with the depths of 60-70 cm; 3), applying fertilizers, to be more specific, applying the nitrogen fertilizers to the bottom of each planting hole before the carya pecan seedlings are planted, filling and covering the roots of the planted seedlings with gravel by the depths of 20-30 cm, and applying the fertilizers to the seedlings 1-2 times in a next year; 4), carrying out irrigation, and to be more specific, watering the carya pecan seedlings once in every 10-12 days; 5), digging soil, to be more specific, carrying out soil digging operation on the roots of the carya pecan seedlings in every 2-3 weeks and forming dug pits with the depths of 10-20 cm. The planting row spacing of each row of carya pecan seedlings is 400-450 cm, and the hole spacing of each carya pecan seedling is 200-230 cm. The method has the advantages that the problem of long growth cycle of existing carya pecan seedlings can be effectively solved by the aid of the method, quick growth of the carya pecan seedlings can be promoted, the death rate of the seedlings can be reduced, and accordingly the method can be further popularized and applied.