Reasonable configuration of attracting fishing lamp is one of important issues in light fishery,and it needs to be analyzed and researched by theorization and practice to figure out the reasonableness of light configuration including varieties and distribution.In this paper,based on optics theory and characteristic of fishing lamp,a luminous intensity formula was established by regarding the lamp as area light source and using method of integral,this method is more precise than regarding the lamp as linear light source or spot light source.The validity of this method was verified by comparing true value and computed value,and the reason of bringing error between true value and computed value was also analyzed.According to this theory,illumination distribution of Type 8154 squid jigging ships on sea level was computed by using Mathematica4,and also the reasonable distance between Type 8154 squid jigging ships was studied.When illumination is 0.005 lx,the reasonable distance is 0.64 nm.