The disclosure relates to a method and device for enhancing the charging security, and belongs to the field of communication. The method comprises the following steps: receiving a request for charging for a first number sent by a first terminal; acquiring the information of the first number, and judging whether or not the first number is a trusted number according to the acquired information; and charging for the first number when the first number is the trusted number, and reminding the first terminal that the first number is not the trusted number when the first number is not the trusted number; wherein the first number is not any number corresponding to the first terminal. The device comprises a receiving module, an acquisition module and a control module. Through the disclosure, the charging security is enhanced greatly; the situation of error charging is avoided; and the property loss of a user is prevented.