A miniature optical lens assembly, which has at least one of optical element, includes the optical element. The optical element includes a low reflection layer disposed on at least one surface of the optical element. The low reflection layer includes a plurality of nanocrystalline grains, and the nanocrystalline grains are located on one surface of the low reflection layer. The optical element is at least one of a light blocking element, an annular spacer element and a barrel element.