The invention provides a method for improving fruit setting rate of pomegranates. The method comprises the following steps: firstly, managing soil, water and fertilizer: after fixed planting of pomegranate treelets, ploughing under to great depth once every three years, and fertilizing at the same time; dressing nitrogen fertilizer before and after germinating; covering pomegranate tree disks with grass, and covering the grass with soil; after pomegranate fruits are harvested, applying base fertilizer, respectively dressing before flowering, after flowering, at the swelling stage of fruits and the flower bud differentiation stage, and spraying foliage fertilizer at the initial flowering stage; watering once a week before germinating, after flowering and at the swelling stage of fruits; secondly, training and pruning, and adjusting the tree vigor; after germinating, removing germinated sprouts at pruning mouths, removing water sprouts and sprout tillers, and thinning weak shoots, insect-plague branches and droopy branches, wherein the diameters of trunks is over 5cm, and girdling when tree crowns are formed; before germinating in spring, ploughing soil of the tree disk, and shoveling off two horizontal roots with the thickness of 3cm; thirdly, artificially pollinating; fourthly, thinning flowers and fruits; fifthly, spraying a plant growth regulator; sixthly, controlling pests. According to the method provided by the invention, the fruit setting rate and the yield of the pomegranates can be effectively improved.