The details of a novel spathic micro-laser technology for laser proximity detection are analyzed. The study of the relative technology in the world is introduced. The performance of spathic micro-laser device (SMLD) and semiconductor laser device (SLD) is compared. The principle of laser fuze with multiple fixed fan beams is described. The methods of target modeling of laser fuze are expounded. Some design keys of signal processing for discriminating air suspended matter (ASM) clutter are given.