The patent of invention is provides with a side door switching mechanism for a toaster, which includes two side doors, a side door open lock catch, a side door closing lifting device and a timing electromagnetic controller. The side door can be closed automatically when the lifting board presses the side door shaft. The side door is opened by press the open push rod with the lock catch lifts up by the gear effect of the gear lever. The patent of invention presents the user hurt by directly contacting the side door.