The invention provides a magnetic pole structure of a power generator, which is characterized in that: magnetic poles of an even number are uniformly distributed along the circumferential direction of an air gap of the power generator, the polarity of every two adjacent magnetic pole is opposite to each other, so a plurality of pairs of magnetic poles can be formed, each magnetic pole has a pole body and a pole shoe, which have an integral structure, the pole body is wound with an excite winding, the pole shoe is provided with a plurality of damping bars which are uniformly distributed along the circumferential direction of the pole shoe, the damping bars pass through the pole shoe, two ends of each damping bar stretch out two end surfaces of the pole shoe, two end surfaces of each magnetic pole are respectively provided with a damping ring, two ends of each damping bar of the magnetic pole are respectively welded onto two damping rings to form a cage-shaped damping winding; the central line of the pole shoe of each magnetic pole stays on different straight lines from that of the pole body, a central line of two pole shoes of each pair of magnetic pole is deviated for a certain radian in an opposite direction or in opposite directions relative to an inter-pole central line, so particular magnetic poles which are non-uniformly distributed along the circumferential direction of the air gap can be formed. Due to the adoption of the magnetic pole structure, the quality of the electric energy of the power generator can be improved; the design, technique and the manufacturing difficulty is low, and the magnetic pole structure is easy to realize on the engineering; and the cost is low, the adaptability is strong, and a good popularization value can be realized.