Boot starting method of digital signal processor and starting apparatus thereof

The invention relates to a boot starting method of a digital signal processor and a starting apparatus thereof. In the boot starting method of a digital signal processor, a boot program is stored in an application program storage page, a start page is shared with the application program storage page in which the boot program is stored, and address space of the start page and of the application program storage page in which the boot program is stored is mapped on a same external memory by using an address decoder. The boot starting method comprises the following steps: setting MP/MC to 1, OVLY to 1, and DROM to 0; powering on or resetting the digital signal processor; executing a start page program according to an instruction of an external memory connected with the digital signal processor; and jumping, according to a page sharing mechanism, to the application program storage page in which the boot program is stored to execute the boot program. Memory capacity space is effectively saved, a signal processing speed is improved, and a real-time processing effect is realized.