The twin-shaft dust humidifier, also known as the twin-shaft dust humidifying mixer, uses two spiral blades for mixing and features high mixing efficiency, minimal footprint, and durable spiral blades made of special alloy or composite ceramic that are resistant to wear, ensuring a long service life. The twin-shaft dust humidifying mixer employs a cycloidal pinwheel reducer for transmission, ensuring smooth operation and low noise. The mixer feeds from the top and discharges from the bottom, with a rational structure. The twin-shaft dust humidifying mixer has tight seals between mating surfaces for stable operation. It is equipped with a uniform spray water system and allows for the adjustment of water supply to meet requirements. The twin-shaft dust humidifying mixer utilizes a hand-pumped oil pump for centralized lubrication of the four transmission bearings, making the equipment easy to use and maintain. The twin-shaft dust humidifying mixer is a device used for spraying water and mixing powdery materials.