The invention provides a security mobile terminal. The security mobile terminal comprises a processor, a security element and a system bus, wherein the processor and the security element access to each other through the system bus; the processor is used for operating a security instruction; the security element is a storage element and only receives the access of the security instruction; the security element is suitable for storing safety data supplied to the access of the security instruction; the system bus comprises a security bit; when the processor operates the security instruction, the security bit is enabled; and the security mobile terminal is a mobile phone or a tablet computer. The security mobile terminal is low in realization cost and high in security.