The invention provides a fuel cell stack inlet air flow regulating method and device, a fuel cell controller, a readable storage medium and a fuel cell vehicle, which belong to the field of fuel cells. The method includes the following steps: controlling the speed of an electric air compressor based on model feed-forward control, namely, controlling the air flow at the inlet of the stack; and then, correcting the speed of the electric air compressor through PID control, namely, correcting the air flow at the inlet of the stack. The pressures at the inlet and outlet of the electric air compressor are taken into account in model feed-forward control, which reduces the interference of the air pressure regulation at the inlet of the stack to the air flow regulation. Therefore, by combining model feed-forward control with PID control, the method ensures both the responsiveness of air flow regulation and the precision of regulation and achieves a good control effect. Furthermore, the power output responsiveness and service life of fuel cells are improved.