Because there is no uniform evaluation standard for DC interconnection project, combined with the characteristics of the project’s investment, construction and operation, the evaluation index system of success degree for DC interconnection project is built in this paper from six aspects: the process evaluation, the economic evaluation, the impact evaluation, the management evaluation, the technology evaluation and the target evaluation. In view of the multiple levels of the index system, the success degree at each level is recognized by fuzzy recognition method. Finally, the feasibility of multi-level fuzzy recognition model is analyzed and verified by examples. The index system and the evaluation model have the certain reference value for the objective and accurate evaluation of success degree of DC interconnection project.