NOVELTY - Method for preventing and treating kiwi fruit tree yellowing disease involves (a) mixing organic fertilizer, organic bacteria and bran and fermenting the mixture to obtain bacterial strain fertilizer, mixing the bacterial strain fertilizer and fresh animal excrement, (b) applying the organic fertilizer for orchards each year in November month, (c) dissolving ferrous sulfate in water, adding chelating agent and stirring and preparing the chelated iron fertilizer and (d) applying chelated iron fertilizer to each plant when orchards appear yellow and observing.    USE - The method is useful for preventing and treating kiwi fruit tree yellowing disease (claimed).    ADVANTAGE - By applying organic bacterial fertilizer and chelated ion fertilizer to the kiwi fruit tree, the content of organisms in soil is increased, the microbial population including lactic acid bacteria is expanded, and the iron supply condition of soil is improved to produce high-quality kiwi fruits.    DETAILED DESCRIPTION - Method for preventing and treating kiwi fruit tree yellowing disease, involves (a) preparing organic fertilizer by (i) stirring fresh animal excrement uniformly, (ii) mixing organic fertilizer, organic bacteria and bran in a mass ratio of 70-80:8:5, stirring and fermenting the mixture for 2 days to obtain bacterial strain fertilizer, and (iii) mixing the bacterial strain fertilizer obtained in step (ii) and fresh animal excrement processed in step (i) in a mass ratio of 7:40-45 and stirring uniformly, piling and fermenting the mixture for 10-12 days to obtain organic bacterial fertilizer, (b) applying the organic fertilizer each year in November month by spreading 500-600 kg organic fertilizer for 10-15 cm orchard, (c) dissolving ferrous sulfate in water, adding chelating agent to the ferrous sulfate and stirring to dissolve and preparing the chelated iron fertilizer, where the mass ratio of ferrous sulfate, chelating agent and water is 4:1:150-170, and (d) applying 10 kg chelated iron fertilizer to each plant when orchards appear yellow, observing for 7-15 days to eliminate the yellowing disease, preparing and applying the chelated iron fertilizer 1-2 times if the disease is not eliminated.