Deep ploughing and fertilization: After harvesting winter jujube, the soil should be deeply ploughed to improve the physical and chemical structure of the soil, promote the expansion and deepening of the root system, destroy the favorable environment for the growth of overwintering pests and diseases in the field, reduce the sources of pests and diseases, and enhance the tree potential. Deep tillage can be combined with base fertilizer, mainly organic fertilizer, supplemented with nitrogen, phosphorus and potassium fertilizer as appropriate according to soil fertility and the growth of winter jujube trees, and sprayed with photosynthetic nutrient film fertilizer on the leaves to help plants absorb a lot of light fertilizer, light energy, light and nutrients needed for plant growth and development to the maximum extent. Watering should be done in time after fertilization, weeding and moisturizing should be done after irrigation to ensure the safe overwintering of fruit trees.

Pruning and shaping: the pruning methods of winter jujube trees mainly include slow release, thinning, short cutting and shrinking. , remove the dense branches, overlapping branches and insect branches, keep the jujube tree well ventilated and transparent, and promote the germination of new branches. When trimming the wound, it is necessary to stick a calluses antiseptic film in time to protect the wound from rapid healing and isolate bacterial infection.

Garden cleaning and anti-freezing: rough skin cracks on winter jujube trees are breeding grounds for overwintering pests. Therefore, when cleaning in winter, it is necessary to scrape off the old warped skin, thoroughly remove the fallen fruit, rotten fruit and weeds in the garden, take them out of the field and burn them or bury them deeply, which can effectively kill the overwintering pests and diseases in the garden. The trunks and bases of big branches are painted white, and the whole garden is sprayed with tree protection liquid to disinfect and prevent frost, protect flower buds from freezing injury in winter and prevent plants from drying up.