In recent years B2C E-commerce has been developed greatly with the fantastic development of the internet. The paper based on user experience theory utilizing the method of content analysis, analytic hierarchy process and multi-level fuzzy comprehensive evaluation method tries to construct the evaluation index system of B2C enterprises and to help consumers make decisions. Firstly, the paper constructs the evaluation index system for B2C E-commerce platform after analyzing selected samples, computing index weight in AHP method and consistency testing. Thereafter, the paper compares and evaluates synthesized competitiveness of Z website and D website by demonstration analysis.