Aiming at the influence of indoor complex environment and indoor lighting node topology on visible light positioning accuracy, a visible light indoor positioning method for multi-LED lighting nodes is designed based on the approximate perfect triangle point test(APIT) algorithm. The method uses the signal transmission time as the judgment voucher of the node spacing size, and combines the APIT positioning algorithm to realize indoor visible light localization. The simulation results show that the positioning error of the positioning method fluctuates around 0.24 m. On the basis of ensuring the positioning accuracy, the layout cost of the positioning device is simplified and the computational efficiency of the positioning algorithm is improved at the same time. The above aspects of improvement make the application of the system more stable and applicable in practical scenarios.