Abstract: The flash bootloading technique for DSPs has been widely used. In conventional methods, JTAG simulators are applied to the debugging and burning of programs, which, however, proves inefficient and inconvenient in the aviation engineering settings.Based on the serial bus transmission mode,a new scheme is proposed in this paper, realizing the tracing and controlling of the entire loading process through the embedded monitoring program and the user's interface.Engineering tests have lent sufficient evidences to its satisfactory operability,efficiency,and reliability.