Fried celery can be blanched for 1-2 minutes. Celery is a vegetable rich in dietary fiber, and celery leaves are rich in soluble dietary fiber, celery stalks are rich in insoluble dietary fiber, but contains oxalic acid, need to blanch to eat, using boiling water more water volume, a short period of time blanching treatment, can reduce the heat loss of nutrients.

Because of the presence of oxidative enzymes in the cellular tissue of vegetables, it can accelerate the oxidation of vitamin C, especially in the 60 ℃ ~ 80 ℃ water temperature, the highest activity. In boiling water, oxidase is not stable to heat, quickly lose activity, while boiling water contains almost no oxygen, thus reducing the loss of vitamin C due to thermal oxidation.