Abstract: For targets of limited size, the principle of detection of laser fuze using the pseudorandom code is studied and the distance model of laser fuze analyzed. The main parameters relations of the laser fuze were obtained. Pseudorandom code generation, laser transmission, laser reception and optical systems are briefly discussed and the corresponding key techniques mentioned, based on the foregoing analyses. It is proved by design and experiments that the technique accords well with the required technical indices of the laser fuze. The theoretic foundation is provided by the technical approaches for designing scientifically the laser fuze detector using the pseudorandom code.