The invention relates to a fast tracking method of the maximum power point for an independent photovoltaic power generation system. The fast tracking method of the maximum power point comprises the following steps of: pre-locating the voltage of a photovoltaic battery component, and starting a perturbation observation algorithm; collecting a perturbation starting output voltage and current to obtain perturbation starting output power, changing disturbance pulse width modulation duty ratio, collecting a disturbance output voltage and current to obtain disturbance output power, and judging whether the disturbance output power is the same as the power of a disturbance starting point or not; if the disturbance output power is the same as the power of the disturbance starting point, determining to be the maximum power point, stopping the disturbance observation algorithm, and recording, locking and updating the voltage and duty ratio of the disturbance starting point; if the disturbance output power is different from the power of the disturbance starting point, tracking the new maximum power point again after the duty ratio is changed; and obtaining the interval output power, the relative change rate of the power and the relative change precision of temperature according to a time interval cycle, and determining whether the output voltage of the updated disturbance starting point is continuously locked or not. According to the fast tracking method of the maximum power point for the independent photovoltaic power generation system disclosed by the invention, the starting is fast, the operation is convenient and reliable, the intermittent disturbance characteristic exists, the conversion efficiency of the photovoltaic power generation system can be effectively improved, and the power consumption and error probability of the system control can be reduced.