The invention belongs to the technical field of oil charge electrical equipment fault diagnosis and relates to a variation trend-based oil chromatography comprehensive analysis method. The method is mainly used in oil chromatography analysis utilizing electrical equipment adopting oilpaper as a main insulating material. The method utilizes a transformer, an electric reactor, a mutual inductor and a cannula. The method analyzes oil chromatography variation trend and combines a modified three-ratio method and a Duval triangle method to realize oil chromatography comprehensive analysis. The method has the advantages of accurate acquisition of oil chromatography variation trend and no code absence.