The working principle of the double-shaft continuous mixer is that the transmission device drives the two shafts equipped with mixing blades to rotate synchronously. When the material enters the machine slot through the feeding port, the water spray device immediately sprays water, transforming the material from a dry state to a wet state. While being humidified, the wet material continuously mixes and blends with each other under the action of the spiral mixing blades, and moves towards the discharge port. Finally, the qualified material is discharged from the discharge gate.