No. The yellowing of cauliflower may be due to the prolonged placement of time, resulting in bacterial growth. Eating may cause gastrointestinal discomfort, such as nausea, vomiting, diarrhea and other symptoms, and cauliflower yellow may be due to the placement process by the influence of the external environment, the production of harmful substances, such as nitrite. These substances are harmful to the human body, and may even cause cancer, so cauliflower yellow can not be eaten.