The process of calculus formation includes acquired film formation, plaque maturation and mineralization. Dental calculus is mainly deposited by the oral cavity of the mineral salts gradually, the rate of its formation varies from person to person, the same body in the oral cavity of the different teeth of the deposition of different speeds, which is related to the body’s metabolism, the composition of saliva, gingival sulcus fluid composition, the amount of plaque, the nature of the food and so on, such as food and soft and viscous food easy to deposit dental calculus. Normally, we should pay attention to oral hygiene, control the formation of plaque through proper brushing, and reduce the formation of dental calculus. At the same time to improve the diet, eat less sweets, soft and sticky food, etc. It is recommended that regular oral examination, found that the formation of dental calculus should be promptly cleaned in a formal hospital, to avoid delaying the condition.