The invention provides a method and a 
system for eliminating multi-channel acoustic echo of remote 
voice frequency interaction. The method for eliminating the multi-channel acoustic echo of the remote 
voice frequency interaction comprises the following steps of: obtaining input multi-channel sound source acoustic signals; carrying out acoustic separation 
processing for the input multi-channel sound source acoustic signals; carrying out acoustic echo 
elimination processing for each-channel acoustic signals which are subjected to the acoustic separation 
processing through a self-adapting filter; combining and carrying out acoustic combination for the each-channel acoustic signals which are subjected to the acoustic echo 
elimination processing; outputting the acoustic 
signal which is subjected to the acoustic combination. The 
system comprises a DSP (
Digital Signal Processor), a multi-channel acoustic separation combining device and a self-adapting filter module. According to the method and the 
system, provided by the invention, the multi-channel acoustic echo can be eliminated with lower cost, high-
quality voice communication is supplied, the method and the system which are provided by the invention can be applied to various complicated remote voice bidirectional voice interaction fields, the smearing time for processing the echo can be increased to be 500 ms, the acoustic bandwidth is in the range of 20 Hz to 20 KHz, and the echo 
elimination ability is increased to be larger than 100 dB.