The present disclosure provides a security display method, a security display device, and a security terminal. The security display method includes the following. In a security display control state, first information to be displayed currently is obtained. It is determined whether the first information to be displayed includes a specified identifier. In response to the first information to be displayed includes the specified identifier, the security processing information is obtained by filtering the first information to be displayed based on the specified identifier, and the security processing information is securely processed. The security processing information is displayed at a security display address. The security display address is a preset fixed display address. Or, a security identifier is added to the security processing information to obtain security display information and the security display information is displayed.