The invention discloses a flower and fruit balanced and healthy maintenance method for crops. The method comprises the following steps of: firstly, carrying out flower forcing, and then, during a flowering phase, after Megafol and Boroplus are blended with water to be diluted, spraying a mixture to leaves and flowers for promoting flower formation; after a flower withers, diluting by Meizuo, adding gibberellic acid, and spraying to the leaves and the flowers; in 10-20 days after fruit retention, diluting by Meizuo and Fruitfat, and spraying; during a fruit embryo swelling period, diluting by Norway cytex, Brexil calcium boron or Lingaibao, evenly mixing, and spraying; after the fruit embryo swelling period, diluting by Megafol, Brexil calcium boron or Lingaibao, evenly mixing, and spraying; during fructescence, diluting and mixing by Megafol and Quality-K, spraying on leaves and fruits; and after the fruit is colored, diluting and mixing by Quality-K and phosphorus-magnesium essences,and spraying on leaves and fruits. The invention puts forward a crop maintenance method so as to solve the problems of crop blooming, fruit setting and flower bud differentiation, and a relationship between branch tips and leaves as well as fruits is balanced so as to improve a yield and fruit quality.