The invention provides a small fisheye lens with high resolution and application thereof. A first lens, a second lens, a third lens, a diaphragm, a fourth lens, a fifth lens, a sixth lens, a filter disc and an image plane IMA are sequentially arranged in the incident direction of an optical axis; the first lens has negative focal power, the object side surface is a convex surface, and the image side surface is a concave surface; the second lens has negative focal power, the object side surface of the second lens is a convex surface, and the image side surface is a concave surface; the third lens has positive focal power, the object side surface of the third lens is a convex surface, and the image side surface is a convex surface or a concave surface; the fourth lens has positive focal power, the object side surface of the fourth lens is a convex surface, and the image side surface is a convex surface or a concave surface; the fifth lens has negative focal power, the object side surface of the fifth lens is a concave surface, and the image side surface is a concave surface or a convex surface; the sixth lens has positive focal power, the object side surface of the sixth lens is a convex surface, and the image side surface is a convex surface; the structure is simple, miniaturization of the lens module is facilitated, the cost is low, the lens has high resolution and clear imaging, and meanwhile the lens has high relative illumination and better image illumination uniformity.