The invention discloses a sound field information collecting method for sound field synthesis and belongs to the technical field of signal processing. A training database is composed of sound pressure data of specific discretion positions on an array collecting plane of a plane microphone. The training database is used for training GMM parameters so that a Gauss hybrid model of sound pressure and spatial information can be established and regression prediction is conducted on the sound field sound pressure of any position on the collecting plane through a regression prediction module based on the Gauss hybrid model so that complete sound field sound pressure information on the collecting plane can be obtained.