The invention relates to a charging station multi-source harmonic wave estimation method based on classification correction. According to the invention, a measurement device which can automatically detect the number of charging piles which are being charged, the rechargeable automobile battery remaining capacity, the charging mode, harmonic waves of charging current, harmonic waves of charging voltage, a charging stage and charging time of each charging pile, the charging station total charging current harmonic wave, charging voltage harmonic waves and other data is designed. Classification processing is carried out according to the detected change characteristics of the charging piles and the total charging station harmonic waves, then the change rule of the charging station multi-sourceharmonic wave characteristics along with the number, structure and charging stage of the charging piles is automatically given, and the charging station multi-source harmonic wave estimation method isgiven according to the change rule. The change and superposition law of the multi-source harmonic waves of the charging station and the estimation method of the change and superposition law can be determined, and effective reference is provided for construction and optimized operation of charging facilities, harmonic control of a power grid and the like.