The invention relates to a medicament for controlling jujube witches broom which is prepared by Chinese patent medicine, antibiotic, plant growing regulator, nutrition liquid, moroxydine hydrochloride and water with a weight percentage of 0.1 to 0.3 percent of the Chinese patent medicine, 0.2 to 0.3 percent of the antibiotic, 0.01 to 0.02 percent of the plant growing regulator, 0.3 to 0.8 percentof Fe element, 0.3 to 0.7 percent of Zn element, 0.2 to 0.6 percent of Ca element, 0.1 to 0.5 percent of Mn element, 0.1 to 0.3 percent of B element, 0.1 to 0.3 percent of the moroxydine hydrochloride and 97 to 98 percent of water. The preparation method is to triturate each medicament according to the proportion, firstly put into the water, after fully dissolving, fetch supernatant liquor to a bottle and seal; the invention is prepared just before using or 1 to 2 days in advance. The medicament is injected into a tree body by an integrated three-pinhead plastic bag infusion apparatus with 1000ml with an injection hole at a base part of a bole. A test result shows that the effective rate of the invention on curing the jujube witches broom is 100 percent and a cure rate can reach 88.8 percent.