The invention discloses a dam deformation condition diagnosis method based on multi-measurement point feature information. The method comprises the following steps: (1) extracting edge features of a plurality of measurement point data, calculating the similarity of multiple layers of extraction information, and calculating the similarity between each two monitoring data; (2) establishing a relevancy matrix, calculating a relevancy mean and standard data of each monitoring data, and selecting data with standard data being equal to 0 and greater than 0.5 as modeling data; (3) establishing a relation mode of multiple measurement points on the modeling data to obtain a significance level and a diagnosis interval; and (4) performing diagnostic analysis on the monitoring data to obtain a diagnosis result significance level. The dam deformation condition diagnosis method provides decision support to master the dam deformation condition and ensure the safe operation of dam engineering.