The contents of trace elements in 100g purple salt are as follows: calcium 6.26mg, magnesium 17.6mg, potassium 130.8mg, sodium 54.2g, iron 69.8mg, copper 0.23mg, phosphorus 9.3mg, zinc 0.90mg, manganese 0.58mg, manganese 0.58mg, and zinc 0.90mg.. The results of trace element composition ratio of purplish red salt prove that saffron salt is a weakly alkaline mineral. When used in food, medicine and health care industries, it has obvious effects on resisting acid constitution, balancing alkaline nutrition, activating various enzymes in human body, and has good effects of preventing cancer and enriching blood. Used in cosmetics industry, it is beneficial to discharge heavy metals, secretions and toxins from human body, make skin moist and moist, adjust pH value and balance skin function.