The existence of thermal noise and shot noise will greatly reduce the positioning accuracy of indoor visible light positioning system. In order to improve the positioning accuracy, a visible light location method based on received signal strength is proposed. Firstly, the adaptive filtering method is used to greatly filter the noise in the received signal, and then the cross-correlation detection method is used to further filter the noise, and the original signal strength is extracted. Finally, the coordinates of the object to be measured are estimated by the least square method. The simulation results show that in a 4 m×4 m×3 m room, the positioning errors of 1681 detection points are within 0.01 m, and the positioning errors are basically the same under different signal-to-noise ratios, therefore, the visible light location method has a certain ability to suppress noise.