A dewing rapid dissipating lens module of the present invention comprises a lens cone, a lens group, a limiting member and a module base. A plurality of ventilation grooves are arranged in the lens cone, the module base is equipped with an accommodating chamber, and the lens group is equipped with at least two lenses, wherein one lens is equipped with a plurality of air discharge ducts at the periphery, and the air discharge ducts are distributed annularly and at intervals. The limiting member limits the lens group to be positioned at the lens cone, and the limiting member, one lens and the module base enclose the two ends of the lens cone separately to form an enclosed system in which the other lenses of the lens group are enclosed. A light path space is formed between the two lenses, so that the air discharge ducts are communicated with each other via the light path space, and the ventilation grooves are communicated with the air discharge ducts and the accommodating chamber, and accordingly, the accommodating chamber, the light path space, the air discharge ducts and the ventilation grooves jointly form an internal circulation channel for moisture dissipation.