Wide-angle lens

The invention provides a wide-angle lens which comprises a front lens set with negative focal power, a diaphragm and a rear lens set with positive focal power from an object space to an image space in sequence. The front lens set comprises a first lens, a second lens and a third lens from the object space side in sequence, wherein the first lens is a negative meniscus lens protruding towards the object space, the second lens is a negative meniscus lens or a biconcave lens, and the third lens is a biconvex positive focal power lens. The rear lens set comprises a fourth lens, a fifth lens and a sixth lens from the object space side in sequence, wherein the fourth lens and the fifth lens form a bonding lens, the fourth lens has positive focal power, the fifth lens has negative focal power, the sixth lens is a biconvex positive focal power lens, and at least four lens contained in the lens from the second lens to the sixth lens are aspheric lenses. The wide-angle lens is low in cost, low in weight, little in distortion, small in size, high in light pervious performance and capable of meeting the requirement of high definition.