With the accelerated process of Chinese-style modernization and the establishment of a new energy system, the requirements for the construction of a modern intelligent power distribution network are constantly improving. For the comprehensive assessment of the distribution network, the self-attention algorithm can fully take into account the correlation between various indicators in the face of the huge and complex distribution network, so as to carry out the comprehensive assessment in a more comprehensive and efficient way. Therefore, this paper proposes a fuzzy comprehensive evaluation method based on self-attention mechanism. Firstly, the indicator system is established, the attention weights of all indicators are calculated by the self-attention algorithm, and then the assessment results are derived by combining the relevant regional data through the fuzzy comprehensive evaluation method. The experimental results show that the adopted evaluation method can efficiently and comprehensively derive the evaluation results, and at the same time has good training stability and flexibility.