The invention relates to a pinching method and anti-lodging cultivating method for fiber or oil and fiber flax. The pinching method includes the steps that after the flax gets into the full-bloom stage, when one to five capsules are expanded to be 4 mm to 6 mm, the flax is pinched only once, wherein the pinching length is 7 cm to 9 cm, pinching is mainly used for removing flowers and fruits, and remaining branches are kept. The anti-lodging cultivating method includes the steps of (1) planting the fiber or oil and fiber flax; (2) pinching the flax with the pinching method; (3) conducting harvesting. According to the pinching method and the anti-lodging cultivating method, the flax can be assisted in resisting lodging, the straw yield of the flax can be increased, and yield reducing of flax seeds and quality reduction of the seeds can also be avoided.