Probabilistic shaping technology can improve the channel capacity of visible light communication system by changing the probability distribution of transmitting source. A new probabilistic shaping algorithm is proposed. Firstly, orthogonal frequency division multiplexing modulation is introduced to establish the visible light communication model. Then, the false sign rate of constellation points is derived theoretically. The simulation results show that the source generated by this algorithm can not only adapt to the current channel condition better, but also avoid the process of obtaining the false sign rate of the receiver through multiple transmission training. Compared with the existing probabilistic shaping algorithms, the proposed algorithm can achieve a higher information transmission rate.