The invention relates to a voice signal recognize technique, wherein the invention is characterized in that: after extracting short character vector and using short decide tree to judge the voice signal and music signal; and using one FIFO to extract the character of long character vector and judge the long decide tree; the short character vector comprises short energy function and short frequency distribution function; the long character vector comprises energy variance, energy over-middle rate, low-energy rate, frequency distribution variable rate and a low-frequency distribution rate; saidshort frequency distribution parameter treats sub-band decomposition via preset multi-resolution wavelet analysis filter and reducing sample. The average error rate of said invention is 0.8%.