Disclosed are an optical lens, and an imaging device comprising the optical lens. The optical lens comprises: a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens in sequence from an object side to an image side along an optical axis, where the first lens has negative optical power, an object-side surface of the first lens is a convex surface, and an image-side surface of the first lens is a concave surface; the second lens has negative optical power, and an image-side surface of the second lens is a concave surface; the third lens has negative optical power; the fourth lens has positive optical power, and an object-side surface of the fourth lens is a convex surface; the fifth lens has positive optical power, and an object-side surface and an image-side surface of the fifth lens are both convex surfaces; the sixth lens has negative optical power, and an object-side surface and an image-side surface of the sixth lens are both concave surfaces; and the seventh lens has positive optical power, and an object-side surface of the seventh lens is a convex surface.