Because in indoor visible light communication (VLC) multiple light sources in ar ray are symmetrically placed on the ceiling of the room, light travels from the light source to the receiver through the direct light and reflection.The user receiving light power and illumination intensity of the same receiving plane are not equal,so it is difficult to e nsure the fairness of communication.In the indoor visible light communication system,light source position leads to the problem of the di stributions of receiving light power and illumination intensity which fast decay from center to edge.To solve the problem we equip th e 4×4LED array transmitter with power adjustment factor,take advantage of ant colony algorithm to model the nodes and paths of receiving light power and illumination intensity,and then set variance as the objective functio n to evaluate homogenization.Based on the established visibility equations,we deduce probability equations of state transition.Final ly,according to symmetrical positions of LED emitter array and receiver,we select a set of optimized power adjustment factors.The si mulation results show that the variance of receiving light power decreases from 168252to 19.2663and illumination intensity decrease s from 653724to 74.859 2,which improves the uneven distribution significantly.Hence,the method proposed in this paper can optimize power coverage and improve the service quality of in door LED communications.