The invention discloses an AVO attribute cross plotting hydrocarbon detection method based on angle rotation, and belongs to the field of geophysical exploration. Forward modeling is performed on a geological layer section to be researched, AVO attribute data of a plurality of sampling points of the geological layer section to be researched are obtained, an AVO attribute crossplot is obtained, trend fitting is performed on all sampling points in the AVO attribute crossplot, a fitting straight line is obtained, translation of the fitting straight line is performed, a background line crossing an original point is obtained, the background line and a vertical line thereof serve as coordinate axes, all the sampling points rotate around a preset coordinate point by the degree of an included angle between the background line and an abscissa axis of the AVO attribute crossplot, and an AVO attribute crossplot after rotation is obtained, so that different AVO abnormality classifications are displayed in an intensified manner, visual identification of abnormality classification of AVO fluids is facilitated, and the value range of hydrocarbons can be quantitatively detected through AVO attributes.