Boot start method and embedded device

The embodiment of the application discloses a Boot start method and an embedded device used for starting the Boot in security. The Boot start method includes the steps that the embedded device runs aCPU (central processing unit) firmware Boot ROM (read-only memory) used for booting and verifying a first level Boot in a storage area; the embedded device then determines whether the first level Bootpasses the verification; the embedded device guides the first level Boot, which is used for booting and verifying a second level Boot in the storage area, to start when the first level Boot passes the verification; the embedded device conducts verification of all second level Boots which include a first Boot and a second Boot; if the first Boot passes the verification while the second book does not pass the verification, the embedded device backs up and restores the second Boot according to the first Boot; the embedded device guides the application software of the Boot to start according to the second Boot passing the