Environmental elements, especially sunny weather, can easily interfere with the operation of a pulsed laser fuze. The solar radiation entering the detection system causes the fuze to produce a "false alarm." Consequently, the bomb may not work accurately. On the basis of the traditional theory of spectral radiation and the detection principle, this study establishes a transmission model of the solar radiation with loss medium damage to analyze the characteristics of sunlight interference. This work studies and simulates anti-sunlight methods, from the receipt of echo signals entering the receiving system to the reduction of the sunlight entering the system. Finally, on the basis of the small impact of laser detection systems, this study builds a test platform to verify the anti-sunlight measures.