Embodiments of the present application provide a lens system, a finger identification apparatus and a terminal device, including a first lens, a second lens and a third lens arranged sequentially from an object side to an image side, where the first lens is a S-shaped meniscus negative optical power lens, the second lens is a biconvex positive optical power lens and a focal length of the first lens and a focal length of the second lens follow a first relationship so that a field of view (FOV) is greater than a first threshold.