The present invention relates to the technical field of electronic terminal devices, and provided thereby are a lens, an active light-emitting module and a terminal, which may protect a conductive layer on an optical element and reduce the risk of the conductive layer being damaged by static electricity. The lens comprises a lens barrel and an optical element installed in the lens barrel. The lens barrel has a sky surface, and a conductive layer is provided on a surface of a side of the optical element facing the sky surface. The lens further comprises: an antistatic structure provided on the sky surface, and a static electricity leading wire provided at an inner part of or on an inner or outer surface of a barrel wall of the lens barrel. One end of the static electricity leading wire is electrically connected to the antistatic structure, and the other end is grounded. The lens above is installed in an active light-emitting module, and the active light-emitting module is applied in a terminal to assist the terminal in implementing functions such as 3D sensing.