In order to eliminate interference from multi-cell and multi-user signals in visible light communication systems, a two-dimensional power allocation algorithm based on orthogonal frequency division multiple access(OFDMA) for multi-cell collaborative visible light communication systems is proposed. Firstly, based on the channel situation, an OFDMA multi-cell collaborative resource allocation algorithm is adopted to allocate higher power to users with poor channel conditions. Then, based on the channel information, the transmission power ratio of multiple cooperative light emitting diode(LED) in the shared illumination area is calculated to obtain the optimal target superposition constellation. The simulation results show that compared with the average power allocation algorithm, the bit-error rate of one-dimensional power allocation algorithm is improved by 16% on average. Compared with the one-dimensional power allocation algorithm, the bit-error rate of the two-dimensional power allocation algorithm is improved by 10% on average.