The short and thick knots of carob beans are not only related to the variety, but also related to the use of products that control the growth of the beans. Excessive control of the growth will inhibit the normal development of the beans. In addition, low temperature damage and root absorption disorders can also cause abnormality of the beans. For growth, apply amino acid fertilizer to the roots to nourish the roots, and spray potassium dihydrogen phosphate plus amino acid fertilizer plus brassinoids or Bihu conditioning on the leaves to promote the growth of beans.