The invention provides a cultivation method for relieving lodging of highland barley, and belongs to the technical field of agricultural planting. The cultivation method for relieving the lodging of the highland barley comprises the following steps: s1, preparing soil; s2, selecting and treating seeds; s3, sowing; s4, fertilizing and managing; s5, irrigating; s6, spraying a conditioning agent; ands7, harvesting. According to the method, the density and the fertilization management of the highland barley population are reasonably controlled, so that the ventilation and light transmission amongthe groups are good, the growth root system of the highland barley is developed, and the root of the highland barley is deep, and stem and leaf tissues are healthy. A plant growth conditioning agentis sprayed on the leaves, and the stem joints of the highland barley are subjected to physiological dwarf, the plants are short in overall plant type, short in section, strong in stem, compact in neck-panicle node, thick in stem wall, and high in stem toughness. The resistance of the external environment is enhanced, the lodging resistance of the highland barley can be improved, the lodging can bereduced, and the yield of the highland barley can be further improved.