The invention provides a superachromatic sunshine collecting optical system. The superachromatic sunshine collecting optical system comprises a first lens (1), a second lens (2), a third lens (3) and a fourth lens (4), wherein the first lens (1) and the second lens (2) are glued together; the third lens (3) and the fourth lens (4) are glued together; the first lens (1), the second lens (2), the third lens (3) and the fourth lens (4) are arranged on the same horizontal optical axis in sequence. The optical system consists of four spherical lenses and can be used for realizing superachromat for a wave band of 400nm-850nm. The superachromatic sunshine collecting optical system disclosed by the invention is used in a sunshine collecting system, and can be used for improving the collecting efficiency.