Abstract: A big data-oriented cloud evaluation method for the complex alliance of new energy vehicles is proposed in this paper based on cloud model theory. First of all, the big data-oriented evaluation model for new energy vehicle alliance is established and the alliance evaluation indicator cloud is generated by using reverse cloud generator and comprehensive cloud calculation. Then, on the basis of determining the weighting clouds of the evaluation indicators and tasks for the alliance, the evaluation clouds of both single-task alliance and multi-task complex alliance are created respectively by applying cloud computing rules, and cloud evaluation and optimization are performed on the alternative schemes of the complex alliance. Finally, a real example is given to verify the effectiveness and rationality of the method proposed.

Key words: new energy vehicles, complex alliance, big data, cloud model, cloud evaluation