Abstract: A wind power machine that generates power or performs work by using the force of the wind. The wind power machine is more efficient in its rotational operation and can used in power generation, water pumping as well as any other application in creating wind power. It comprises an outer tower and a rotatable inner tower in which the outer tower is fixed and provided with flow guiding plates. The air flow is efficiently guided in and out of the tower through the flow guiding plates. The inner tower is movably mounted inside the outer tower, it is rotated by the air flow drawn in from the outside so that its supporting shaft can generate a twisting momentum for power generation. When a motor is used to rotate the inner tower, then the inner tower works as a circulating fan. This is characterized in that the angles of the flow guiding plates can be adjusted synchronously, moreover, V notches are provided on the flow guiding plates as well as the fan blades.