In order to meet the demand of apples for nutrients, topdressing should be carried out in time, and the number of topdressing depends on climate, soil, tree age and fruit-bearing status. Common topdressing periods are pre-flowering, post-flowering, fruit expansion and flower bud differentiation. Due to the lack of elements in fruit trees, the use of trace elements can be combined with root application and "micro-fertilizer" to irrigate roots from flowering to autumn, which can induce plants to absorb, digest and release nitrogen, phosphorus, potassium and various trace elements in the soil, improve the positive energy of fruit development and optimize fruit quality. Pruning in summer is mainly to make up for the shortage of pruning in winter, and the relationship between growth and fruit is adjusted by using the laws of tree nutrition and endogenous hormone synthesis, transportation, accumulation and consumption in growing season. In April and May, when the disease develops rapidly, it is necessary to check and scrape the apple tree canker, and root application and "pesticide" irrigation can promote the effective components of pesticides to kill the root pests of fruit trees.