This article, through imitating the experiment of the optical properties of lamp boxes, depending on the collection experiments of different fish aggregation lamp boxes, and using matlab 7.0 software building the illuminance distribution model of saury aggregation lights, studies and contrasts the lamp effect of different light illumination in fishing gathering lamp. The results show that: different ground illuminance distribution of fishing gathering lamp with distance increasing increases first and then decreases; and the change laws of lamp strong values and the illumination distribution are different in different fish collection lights. There is the maximum at the distance of 1 meter, and the light intensity meets: high light intensity > middle light intensity > lower light intensity; with the light moving from the upper to the lower, the light intensity coefficience of k(L) decreases gradually. It shows that the middle light intensity changes stability and it could represent the changes of the whole lamp boxes to some extent.