Secure starting method and device

The invention discloses a secure starting method and device. The method comprises the steps that an upper-level starting item in a starting chain reads a starting mirror image of a lower-level starting item; a secure efficacy value of the starting mirror image is calculated; a standard efficacy value, corresponding to the starting mirror image, stored in a secure chip is read in an unauthorized reading mode; the secure efficacy value and the standard efficacy value are compared; if the secure efficacy value is matched with the standard efficacy value, the lower-level starting item is started; or otherwise starting is stopped. Through the starting mode, the technical problem that in the prior art, starting efficiency is low due to limitation of decrypted data length by use of a decryption mechanism is avoided. Meanwhile, according to the secure starting method, it is only needed to update the standard efficacy value of the starting item needing to be updated into the secure chip during system updating, other s