Address setting and signal transmission method and LED module based on the power line working condition

An address setting and signal transmission method and LED module based on the power line working condition comprising: inputting a signal flow via a power line; demodulating, by a demodulator, the signal flow into a voltage signal and a coded signal; parsing the coded signal into an address coded signal and a control coded signal; and performing address writing on the address coded signal by a first data processor to form a comparative address database and then storing same in memory. The desired light-emitting effect is obtained by means of a second data processor processing subsequent coded signals according to the comparative address database and outputting same to a load. In an LED module made according to this method, the number of power line beams is saved, and coding location of the address of a lamp bead string is implemented easily by means of coding.