This paper analyzes the basic principle of short-circuit current control. Through theoretical derivation, the mechanism of high impedance transformer to limit short-circuit current is demonstrated. Based on AHP, this paper constructs the structural relationship of evaluation method containing the target layer, rule layer and index layer, establishes judgment matrix through the quantization index value, and calculates the weight of each index coefficient and membership functions. Combined reviews set of the actual project with expert knowledge, from four aspects i.e. limiting effects, operation economy, one-time investment costs and the impact on system stability, it makes fuzzy comprehensive evaluation on application value of high impedance transformers and calculates the priority of fuzzy evaluation program. Using China EPRI PSASP simulation software, instance simulation is verified based on the 2016 North China Power Grid short circuit data. The results demonstrate that the comprehensive evaluation proposed is of practicality and efficiency in engineering application.