Abstract: Offshore wind generation is one of the important development trends of renewable energy. In order to reduce the cost of the power generation, the individual capacity of the offshore wind turbine aims at 10MW and above. The high-temperature superconducting (HTS) direct drive (DD) generator is one of the most competitive solutions for large offshore wind turbine, due to the advantages of small size and light weight. However, there are technical difficulties in the HTS excited DD generator derived from the electrically excited DD synchronous generator, such as the rotational seal of the coolant, the electrical brush and slip ring of the current transmission, and the design of the torque tube. In order to overcome the previously mentioned drawbacks, a HTS dual-stator generator (HTS-DSG) with stationary seal is proposed, based on the airgap magnetic field modulation theory for electrical machine, which can realize the stationary seal of coolant and the brushless current transmission at the same time, besides, the torque tube can become easy to design. In this paper, the topology and operation principle of the proposed HTS-DSG was illustrated, and the electromagnetic performance, fabrication process, experimental platform and test result of a 10kW HTS-DSG prototype were presented in detail. The success of the prototype verified the principle feasibility of the HTS-DSG. In addition, the corresponding fabrication and test methods were summarized, which provided a reference for the future engineering application of the HTS-DSG.