Bus arbitration starting method of reliable embedded system

The invention provides an embedded type system start-up guiding method which is established on the basis of a trusted mechanism, wherein, an embedded type system is combined with a trusted platform module (TPM); an external memory device in the embedded type system is independent from the system and reading and writing of the external memory device are controlled by the TPM; integrity verification of executable codes in an external memory must be performed by the TPM during the start-up process of the embedded type system; the authority of reading and writing of the external memory can be endowed to the embedded type system by the TPM only when verification passes, and the embedded type system is allowed to be started up. In the invention, the TMP is at the core position during the start-up process of the system and can conveniently realize start-up flow of the trusted embedded type system by controlling a bus arbitration chip; moreover, the TMP has the advantages of convenient and flexible start-up control,