Abstract: In the maximum power point tracking (MPPT) control of the traditional power signal feedback (PSF) method for the direct-driven permanent magnet synchronous generator (PMSG), it is necessary to obtain the power-speed curve of wind turbines in advance, and wind energy conversion efficiency of the turbines will change with time, thereby reducing the control accuracy of PSF method. Based on the traditional PSF method, this paper proposes an improved MPPT control strategy for PMSG considering internal loss. This strategy tracks the maximum power points of wind turbines through the hill climb searching method and then accurately calculates the proportion coefficient required by the PSF method and the reference power to track the maximum wind power. Both the simulation and experiments verify the effectiveness and feasibility of the proposed control strategy.