The invention discloses an overwintering method for one-year-old to two-year-old saplings, comprising the following steps of early defoliation, forcing dormancy, improvement of cold resistance, root collar hilling, sufficient filling of freezing water to prevent freezing damage to root collars, whitewashing and wrapping by a long-cylinder plastic bag, so as to keep the temperature of the tree bodybasically stable, and avoid frost damage caused by too large day-night temperature difference. The plastic sleeve sleeves the main stem of the sapling with lateral branches pruned, the cold-proof measures are simple and easy, and the cold-proof effect is good. The tree stems of the sapling can be prevented from being broken during soil covering, and the tree trunk also can be prevented from beingdamaged when cleaning the soil in spring.