Method for reducing malformation rate of citrus fruits

The invention relates to the field of plant planting, and provides a method for reducing the malformation rate of citrus fruits. The method comprises the steps that the pH value soil is adjusted to range from 5.5 to 6.5, the boron content of the soil of trees is increased, the tree structure is transformed, flower thinning is carried out in the flower season, tree nutrition is supplemented, the flower bud quality is improved, and therefore misshapen fruitlets are reduced; flower thinning is carried out in the second physiological fruit drop period to reduce nutrient consumption, a fruit retention agent is sprayed to control physiological fruit drop, and the fruit upright degree is improved; overground part nutrition and accumulation of carbohydrate are increased, flower bud differentiationis promoted, and the fruit quality is improved. According to the method, the malformed fruit occurrence rate can be reduced to be below 10%, the commodity fruit rate (85% or above) is remarkably increased, the yield of the c