The invention discloses a channel estimation method suitable for the implicit sequence of wireless optical communication, which adds period training sequence algebra taking up a small part of sending power to the data information so that precious bandwidth resource can be saved. As the channel estimation performance is easy to be interfered by factors like data information, Dc bias and power distribution, firstly the data dependence method is adopted to remove the circumference mean value of the data information, and the aim of effectively removing data information is achieved. Meanwhile, the estimation of DC bias is realized through adopting relevant matching method, and the receiving end output SNR (Signal to Noise Ratio) maximum criterion is adopted to obtain the optimal power allocation factor. With all the above measures, the influence of different interference factors to the implicit sequence channel estimation performance can be effectively eliminated, and the accuracy degree of the channel estimation can be further improved, and thereby it is proved that the scheme can greatly enhance the system performance.