1. Water in time: Highland onions need to keep the soil moist. If the soil is too dry, onions will climb up. Therefore, water in time to keep the soil moist.

2. Fertilization: The growth of onions needs sufficient nutrients. If the soil nutrients are insufficient, onions will climb up. Therefore, timely fertilization is needed to provide sufficient nutrients.

3. Loosening soil: The growth of onions needs a good soil environment. If the soil hardens or hardens, onions will climb up. Therefore, we should loosen the soil in time to improve the soil environment.

4. Control density: Excessive onion density will also lead to climbing. Therefore, it is necessary to reasonably control the density of onions and maintain an appropriate spacing.

5, pest control: if the onion is attacked by pests and diseases, it will also climb up. Therefore, it is necessary to strengthen pest control and spray pesticides in time.