Vegetables have shallow roots and poor frost resistance, which may lead to low yield and no grain harvest. It is very important to prevent vegetables from freezing at low temperature in winter. According to our experience, it is obvious to supplement the key nutrients of antifreeze. Phosphorus supplementation can promote cell division, increase the number of cells, arrange more closely, and enhance frost resistance; Calcium supplementation can thicken the cell wall, increase the elasticity of the cell membrane and prevent the invasion of cold; Potassium supplementation can increase the viscosity of cell fluid and improve the freezing resistance; Zinc supplementation can stimulate the formation and release of antifreeze enzymes in crops. It is suggested that the application of micro-root calcium+micro-energy 2kg/ mu before low temperature, and spraying micro-excitation force+micro-covering force twice at the same time can greatly reduce the freezing damage loss.