The utility model relates to a plane spiral microphone array which comprises an array camera arranged in the central position, an array main body, and a plurality of microphones mounted on the array main body, wherein, the array main body is provided with a plurality of plane spiral rigid spokes. The microphone array is characterized in that the microphones are distributed at crossing nodes of an n multiplied n square-formed line, which are evenly formed on the plane at intervals; n equals to an integral multiple of 15 or 21; eight plane spiral rigid spokes are provided, and eight array elements are arranged on each plane spiral rigid spoke; and the 64 array elements are distributed on the crossing nodes of a 15 multiplied 15 square-formed line. The microphone array has the advantages of simple and reliable structure, small amount of support arms connected to each node, little influence to the sound field, facilitation of detection accuracy improvement, fully rigid structure, firmness, reliability, avoidance of errors caused by effective hole diameter changes due to soft connection, large amount of array element microphones, high Information collection capacity, high positioning accuracy and large positioning range.