The invention discloses an echo noise reduction method through the multi-dimension technology. The realization process of the echo noise reduction method comprises the steps that the sound source azimuth is located according to the number of audio acquisition equipment, wherein the audio acquisition equipment refers to at least two acquisition devices; the transmission process of sound waves is simulated according to the geometrical characteristics of a multidimensional space, and echo data transmitted in the delayed way are processed by using the multi-dimension technology; clutter signals are intelligently filtered through the geometrical characteristics, and synthetic processing of audio signals is accurately controlled; and the synthesized audio data are exported. Compared with the methods in the prior art, the special requirements for the acquisition equipment are not required in the whole noise reduction process so that the echo noise reduction method through the multi-dimension technology has the advantages of being low in cost, easy and convenient to arrange and low in the requirement for the professional level of users in comparison with professional audio acquisition equipment; and the method is high in practicality and wide in range of application so that the technology can be widely applied to VoIP products of various platforms and plays an important role in enhancing conversation quality and service quality and thus the method is easy to popularize.