The invention discloses a method for easily authenticating flooding tolerance of kiwi fruit seedlings. The method comprises the following steps: a plastic box is buried in soil of a rain sheltering greenhouse, the edge of a box body and surrounding soil are arranged on the same horizontal plane, and nutrition bowls planted with the kiwi fruit seedlings are placed in the plastic box randomly; water is irrigated in the plastic box to enable root systems of the kiwi fruit seedlings to be completely immersed in the water; the situations of top tips and leaves of the kiwi fruit seedlings in the flooding process are recorded, the flooding time or the number of wilt leaves is used as an index, and flooding tolerance authenticating evaluation is carried out on various test materials. According to the method, the flooding time or the number of the wilt leaves can replace an existing complex evaluation system, the needed time is short, the operation is convenient, the result is obtained by testing several indexes of the survival rate, chlorophyll, peroxidase activity and root activity so as to comprehensively evaluate the stress resistance verification, the result is consistent with the visual flooding time or the number of the wilt leaves, and therefore the method is stable and reliable in result, easy to operate, and suitable for rapidly screening flooding tolerance seedling kiwi fruit seedling plants in a mass mode.