The invention relates to an electricity market trade evaluation criterion measuring and calculating method, in particular to an electricity market trade evaluation criterion measuring and calculating method based on hierarchical clustering. The electricity market trade evaluation criterion measuring and calculating method comprises the following steps: 1.1 selecting electricity market pre-trade early-warning indexes; 1.2 determining the number of sample data clusterings by performing hierarchical clustering on segmentation indexes which can reflect a market structure and market supply and demand, an electricity market trade unrestraint average transaction price, top4 indexes, a declared HHI (herfindahl-hirschman index) and a declared supply and demand ratio which are determined in the previous step 1.1; 1.3 according to the number of sample data clusterings determined by the hierarchical clustering method, obtaining final class-center difference and class-center excursion degree between classes by utilizing the k-means algorithm so as to establish an electricity market supply-demand early-warning model. According to the electricity market trade evaluation criterion measuring and calculating method disclosed by the invention, quantitative analysis refers to dynamically classifying indexes into excellent, medium and poor indexes, so that the indexes with similar characters are classified together, the fuzziness of qualitative analysis is overcome, and the electricity market trade evaluation criterion measuring and calculating method has the advantages of being high in recognition speed, high in classification accuracy rate, high in classifying efficiency, simple to operate and the like.