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In this study,the data mining crawler technology was used to obtain the information of top 100 liquor list and more than 13 thousand related post-purchase review,liquor products was divided into six grades according to the price.Used TextRank algorithm to work out the key words of reviews and their weights of each grades products,then combined with the characteristics of online shopping consumption to establish an evaluation indicators of net purchase of liquor product.The paper classifies the key words of each grade of liquor products by the indicators established before,thus acquiring the evaluation system of six gradesliquor by the weights.Based on the results,the paper explores the differences in the concerns of consumers buying different liquor products at different prices and puts forward the corresponding marketing management suggestions.