In the mission of space gravitational wave detection， to ensure that the test mass as the inertial reference is not disturbed， the spacecraft needs to adopt the high-precision drag-free control technology so that the satellite platform can follow the test mass. At the same time， the inter-satellite laser ranging also puts forward high requirements for the spacecraft pointing. To meet the needs of space gravitational wave detection， a drag-free control method based on a non-contact satellite platform is proposed. This method is based on the design of a subdivision satellite platform. The maglev mechanism between the payload cabin and the platform cabin is used to replace the micro-propeller in the traditional satellite to control the payload cabin. The payload cabin follows the test mass while the platform cabin follows the load cabin， in order to achieve the high-precision drag compensation and platform pointing. The simulation results show that the attitude pointing accuracy of the non-contact satellite platform is 6×10^-4 °， the attitude pointing stability is 2×10^-4 （°）/s， and the residual disturbance acceleration on the test mass after drag compensation is about 10^-15 m/（s²·Hz^1/2）.