The invention provides a multi-channel spatial synthesis azimuth filtering method for vector sensing. The method comprises the following steps of using a vector sensor for collecting four-channel signals; setting an angle search range interval of the direction of arrival; correspondingly dividing the angle range of a given horizontal direction angle into a set of a plurality of search space angleranges; performing vector synthesis on each search range interval delta theta of the multiple spatial orientations, performing cross-correlation on the synthesized signals and the sound pressure signals p (t), sorting correlation values, selecting the maximum correlation value and outputting synthesized signals corresponding to the maximum correlation value. According to the invention, the spatialorientation characteristic of a vector sensing receiving signal is utilized. Discrete space synthesis is carried out on a planar vibration velocity channel, orientation filtering is realized throughcorrelation between a synthetic signal and a sound pressure channel by utilizing the spatiality of noise and the orientation of the signal, interference information of other orientations in space is filtered, and the problem of filtering and noise reduction under the traditional scalar sound sensing technology is solved.