Embodiments of the invention provide a device protection method and apparatus of laser projection equipment. Temperature collection apparatuses are arranged on the outer edges of four edges of a window aperture region of a DMD chip of the laser projection equipment respectively; the device protection method comprises the steps of determining a monitored temperature of the DMD chip according to the temperature collected by each temperature collection apparatus; if the monitored temperature of the DMD chip is greater than a first preset temperature and less than a second preset temperature, lowering the emitted laser luminance of the laser projection equipment by one preset gear; if the monitored temperature of the DMD chip is greater than or equal to the second preset temperature and less than a third preset temperature, lowering the emitted laser luminance of the laser projection equipment to the lowest gear, and then improving the emitted laser luminance of the laser projection equipment gear by gear gradually; and if the monitored temperature of the DMD chip is greater than or equal to the third preset temperature, closing the laser projection equipment. The device protection method and apparatus are used for lowering fault rate of the DMD chip.