Pacific saury Cololabis saira is one of main fishing targets in the temperate waters of the northern Northwest Pacific Ocean, and fishing lamp lighting configuration is an important content of efficient fishing technology for saury fishery. Through the imitating experiment of the optical properties of lamp boxes, the paper established the illuminate distribution models of saury aggregation lights using Matlab7.0 software and analyzed the light illumination effects of fish aggregation lamp boxes under different inclination scenarios. The results show that, when the angle of fish aggregation lamp boxes was 30°, 45°, and 60°, the ground illumination of saury aggregation lamp boxes decreases with the increasing of ground distance, and there were significant differences between ground illumination distribution at different inclinations, and the attenuation degree of illumination distribution also decreased with the increasing of light box angle. Significant difference on fluctuation of light field can be found between the illuminations at different inclinations. The fluctuation of light field for the illumination at 30° inclination was remarkable compared with those at 45° and 60° inclinations. The density of illumination isoline decreases as the increasing of inclination angles. When the angle of fish aggregation lamp box was 60°, the distribution of illumination and the fluctuation of light fields were relatively stable, and the larger area conducive to aggregating saury can be found.