Abstract: The present invention discloses a preparation and a method for improving ring rot resistance of apple fruits and belongs to the technical field of plant disease resistance. Resistance of apple fruits to ring rot may be significantly improved by soaking the fruits with a sorbitol solution. Moreover, the sorbitol solution is effective to multiple varieties; the barrier in control of ring rot through chemical pesticides and the like may be overcome; and pollution of the pesticides and the like to the ecological environment is greatly decreased, thereby decreasing losses caused by occurrence of apple ring rot in a maturation period or a storage period.