When the pulsed laser detection system is applied to the conventional ammunition process, the single-beam forward detection structure cannot meet the circumferential positioning requirements. At the same time, the system structure requirements are as simple as possible, so the traditional beam layout cannot be directly applied. Therefore, a multi-beam large field of view pulse laser circumferential detection scheme is proposed. According to the optical field characteristics and detection requirements of the laser transceiver system, based on the aspherical optical design theory, the array lens optical system of laser shaping expansion and large field of view is designed, and the narrow pulse high current pulse laser driving circuit, high sensitivity and high signal to noise ratio photoelectric amplifying circuit are designed. Based on the FPGA target azimuth discrimination and anti-interference strategy, the anti-interference ability of the system is effectively improved. The projectile rendezvous is established，and the model is also analyzed for target capture rate. The prototype machine is processed and static experiments are carried out. The results show that the prototype can effectively detect the short-range targets of not less than 5 m, and realize the 360 degree large-field circumferential detection of conventional ammunition laser proximity fuze.