Along with the rapid social development, the competitiveness of enterprises is stronger and stronger. It is obvious that the enterprise long-term competitiveness depends on the preferable strategic development. Therefore, the scientific evaluation of enterprise strategic competitiveness is of great significance. Based on these, this paper evaluates the strategic competitiveness of the electric power construction enterprise from four dimensions, namely, the enterprise strategy, organization scale, the enterprise culture and enterprise resources, furthermore, we build the evaluation index system of construction enterprise, and use the interval fuzzy soft set to evaluate construction enterprise competitiveness. The analysis results of an actual case show that this evaluation method can objectively reflect the real situation of the electric power enterprise competitiveness and feasible in practical application. In the end, this paper provides reasonable suggestions in order to improve enterprise competitiveness.