The invention relates to a method for improving the salt tolerance of sedum aizoon plants by means of directional induction. The method includes selecting robust adult sedum aizoon plants, thoroughlyrinsing the middle positions of the robust adult sedum aizoon plants, then separating stems and leaves from one another, cutting the stems to obtain segments with the sizes of 5-8 cm, preliminarily disinfecting the stem segments, then thoroughly rinsing the stem segments by distilled water, further sterilizing the stem segments by 0.1% mercuric chloride solution and ultimately thoroughly rinsing the stem segments by distilled water to obtain sterile stem segments; cutting the sterile stem segments to obtain stem segments with the sizes of 1 cm, and further longitudinally cutting the stem segments to obtain stem segments in the shapes of half-cylinders; inoculating the stem segments in the shapes of the half-cylinders in induction culture media and acquiring stem segment callus tissues after 12-15 d; carrying out salinity incremental salt-based multi-generation culture and improving the salt tolerance of the sedum aizoon plants by means of continuous induction. The method has the advantages that the method is easy to operate and high in efficiency, and the salt tolerance of the sedum aizoon plants can be obviously improved by the aid of the method; the salt tolerance of obtained salt-tolerant plants can be improved by 30%, rooted seedlings can normally grow in soil with the salt content of 7 g/kg, and established seedlings can normally grow in soil with the salt content of 10 g/kg.