The invention provides a lighting device which can utilize multiple light-emitting modules to obtain the desirable light distribution, can simplify a structure and realizes structure miniaturization. The lighting device comprises a device main body, a mounting plate, multiple light-emitting modules, multiple lenses as well as an illumining circuit, wherein a lower surface of the device main body is provided with an opening part, the mounting plate is of a flat plate shape, and is arranged in the device main body in the manner that the lower surface of the mounting plate is opposite to the opening part; the multiple light-emitting modules are provided with semiconductor light-emitting components which are arranged on the lower surface of the mounting plate, the multiple lenses are arranged on each light-emitting module and can control the light distribution of the light of the light-emitting modules; and the illumining circuit is arranged in the device main body and arranged on the upper side of the mounting plate so as to illumine the light-emitting modules.