The embodiment of the invention discloses an automatic focusing method and apparatus and a mobile terminal. The method includes that when a focusing event is triggered, and determining a first spot light source determining condition if a camera is detected to be on a first position, wherein the first position is the corresponding position where the surface of the camera faces downwards and the and included angle between the surface of the camera and the vertical surface exceeds a preset angle threshold, the first spot light source determining condition is less restrict than a second spot light source determining condition, and the second spot light source is located at the position outside the first position with respect to the camera. The method further includes determining whether the current shot objected is a spot light source according to the first spot light source determining condition, and executing corresponding focusing operation according to the determining result. When the technical scheme is adopted, the determination process of the mobile terminal on whether a shot object is a spot light source in an automatic focusing process is optimized, focusing accuracy is ensured, defocusing phenomenon is prevented, and the user experience is improved.