The invention relates to a face recognition method. The face recognition method includes the steps that when a mobile terminal is in a screen-locked standby state, a face image and an iris image are acquired according to a biological image acquisition instruction; the distances between all points of the surface of an object in front of the mobile terminal and multiple ultrasonic transmitters are calculated according to ultrasonic reflected signals received by a microphone of the mobile terminal; a three-dimensional model of the object is established according to the distances between all the points of the surface of the object and the ultrasonic transmitters; whether the established three-dimensional model is matched with a preset three-dimensional model or not is judged; if the matching degree of the face image and a first face template is larger than a first preset threshold value, the matching degree of the iris image and a first iris template is larger than a first preset thresholdvalue, and the established three-dimensional model is matched with the preset three-dimensional model, the mobile terminal is unlocked. The mobile terminal can be unlocked only after triple recognition confirmation, and the security can be improved.