The invention provides a sound array device for vehicle tire noise power level testing and belongs to the technical field of noise measurement. The device comprises a hemispherical enveloping surface support, a plurality of microphones arranged on the hemispherical enveloping surface support and a sound evaluation module. The hemispherical enveloping surface support covers the area where a vehicle passes. The plurality of microphones are uniformly and symmetrically distributed on the hemispherical enveloping surface of the hemispherical enveloping surface support. The sound evaluation module is connected with the plurality of microphones and is used for receiving and analyzing noise information collected by the plurality of microphones. The sound array device for vehicle tire noise power level testing is based on the sound array technology, collects the vehicle tire noise power information by uniformly and symmetrically arranging the plurality of microphones on the hemispherical enveloping surface support, tests tire noise power of vehicles of different sizes and types, and finally extracts sound source features of tire noise.