The invention provides an optical lens system, the optical lens system sequentially comprises, from the object side to an imaging surface, a first lens, a second lens, a third lens, a fourth lens, a fifth lens, a sixth lens and a seventh lens, wherein the first lens is provided with negative focal power, and the concave surface of the first lens faces the object side; the second lens is provided with positive focal power, and both sides of the second lens are of convex surfaces; the third lens is provided with positive focal power, and the convex surface of the third lens faces the object side; the fourth lens is provided with positive focal power, and both sides of the fourth lens are of convex surfaces; the fifth lens provided with negative focal power, the both sides of the fifth lens are of concave surfaces, and the fourth lens and the fifth lens constitute a agglutinate ophthalmic lens; the sixth lens is provided with positive focal power, the concave surface of the sixth lens faces the object side, and the concave surface of the sixth lens faces the image side; and the seventh lens is provided with negative focal power, and the concave surface of the seventh lens faces the imaging surface. Diaphragm is arranged between the first lens and the third lens, the first lens, a fourth lens and the fifth lens are of glass spherical lenses, and the seventh lens is of a glass aspheric lens. A camera lens of the optical lens system has heat stability, has sky-high resolving power to objects transmitting or reflecting monochromatic light with different wave lengths, and can meetthe unmanned camera lens requirements.