The invention relates to an infrared and glimmer multispectral fusion front end optical-mechanical structure, comprising a case, a wedge-shaped pedestal, a first light hole, a second light hole, a video wire, a glimmer image intensifier battery, a glimmer objective lens, a glimmer image intensifier, an infrared objective lens and an infrared detector; wherein the front end of the glimmer objective lens is provided with an optical wedge, the infrared objective lens and the infrared detector jointed behind the infrared objective lens form an infrared detection device, the glimmer objective lens and the glimmer image intensifier connected behind the glimmer objective lens form a glimmer detection device, the wedge-shaped pedestal is fixed in the interior of box body, the infrared detector and the glimmer image intensifier are fixed on the wedge-shaped pedestal, the infrared detection device and the glimmer detection device are placed downward in vertical direction, the optical axle of the infrared objective lens and the glimmer objective lens are in the same vertical plane and in parallel, the included angle of the optical axle is less than or equal to 0.1mRad; and the infrared objective lens and the glimmer objective lens have the same field of view. The structure is easy to process, registration accuracy is high, and imaging effect is good, thus having good market prospect.