The present invention relates to the field of optical instrument technology, and discloses a dual-optical coaxial module, including a hood body, the hood body is mounted with a lens, the hood body is mounted with a photoelectric switch transmitter and a photoelectric switch receiver, the photoelectric switch transmitter and the photoelectric switch receiver are located on both sides of the lens, the inside of the hood body is also installed with an infrared emitter, and the infrared emitter is set directly to the lens, and the hood body is provided with a gas supply component and a jet assembly for use. When the bifocal coaxial module proposed by the utility model is used, when the water mist is generated on the lens, the infrared emitter will be energized and run, the infrared emitter can emit infrared rays when running, the infrared rays will be fully irradiated on the lens after the diffusion effect of the concave lens, the infrared rays can heat the lens, when the lens is heated, the water mist generated on the lens will evaporate and disappear, and the water mist on the lens will be eliminated to ensure the accuracy of the bifocal coaxial module.