Calcium citrate is a kind of organic acid calcium, which has the characteristics of easy absorption, high utilization rate, high safety, etc. Moderate supplementation can provide energy for the organism and is beneficial to human health. Calcium citrate has higher solubility and utilization rate than inorganic calcium acid, it has no stimulation to the stomach and intestines, and can be directly absorbed and utilized without gastric acid activation fluid. Calcium citrate is the first choice of calcium supplements in food products. Moderate supplementation of food products containing calcium citrate can supplement the nutrients needed by the human body and is beneficial to human health. Calcium citrate has a wide range of applications, as the calcium source of food and health products is mainly used in milk powder, pastries, jelly and other food products, but also as a chelating agent, corrosion inhibitor, tissue coagulant and other applications in the field of chemistry, with easy to absorb, high utilization rate, safety and other characteristics. Food, health products containing calcium citrate content is limited, the need to supplement calcium crowd or need to listen to the advice of a professional doctor to choose a scientific and reasonable method of calcium supplementation, to avoid the use of private discretionary use of the body to cause adverse effects.