Multi-frequency flooding power line carrier communication method

The invention provides a multi-frequency flooding power line carrier communication method. The method comprises the following steps that a power line carrier communication system is initialized, a main station cognizes the work frequency of slave stations, and the main station is communicated with the slave stations through multiple frequencies of data. According to the method achieved based on the frequency cognition and flooding technology, different frequencies are selected according to conditions of different slave conditions/chains, the method adapts to the characteristics of a power line carrier network channel, the access probability of the slave stations is increased, and the network coverage range is improved.