Internal spiral unit

The present invention relates to an internal spiral unit, which mainly comprises a spiral pipe and a power source to generate power. The spiral pipe is a hollow pipe body having spiral blades inside, and outer edges of the spiral blades and inner wall surface of the hollow pipe body are seamlessly joined to synchronously rotate the spiral pipe and the spiral blades as the power source is driving the hollow pipe body or the spiral blades. With the precession of the spiral blades inside the hollow pipe body, it can be applied to transportations of fluid (such as water, oil, etc.) or solids (such as corn kernel, grain, plastic material, etc.), or applied to the field of spiral stirrer, fluid power generation, etc. for achieving advantages of complete fit, structural strength enhancement, flow stability, long usage lifetime, etc.