The invention discloses an imaging method, an imaging device and a mobile terminal. The imaging method comprises the following steps of utilizing a prism group to a ray of light from a camera lens to carry out total reflection and light splitting processing in order to form two parts of rays of light; and respectively imaging the two parts of rays of light through a first camera component and a second camera component. The rays of light received by sensors of two camera components are from the same light path, so that an image has no deviation, the pixel-level alignment is realized, and the thickness of the mobile terminal is guaranteed to have no increase structurally, so that when the images of the two cameras are fused, the image deviation is not considered, and the software cost and the calculation deviation are reduced.