Due to the strong spatial directivity of the traditional Lambertian beam, the design of visible light communication transmitter based on isomorphic Lambertian beam is difficult to provide satisfactory spatial coverage. Considering the charac-teristics of various non-Lambertian light beams of commercial light-emitting diode(LED) light sources, a transmission diversity technology scheme based on non-Lambertian light beams is proposed. This scheme can make full use of the respective spatial radiation characteristics of the non-Lambertian optical beam to project more transmitted optical power to the coverage edge area far away from the optical transmitter. When the overall transmitted optical power is kept constant and the diversity angle is 60 °, the proposed non-Lambertian diversity scheme can introduce a minimum signal-to-noise ratio gain of 3.4 dB, at the same time, the fluctuation amplitude of signal-to-noise ratio is reduced from 19.4 dB in traditional design to 13.5 dB in non-Lambert design.