Abstract: With the improvement of people’s requirements for living environment, the impact of substation characteristic low-frequency noise on human body has gradually attracted great attention. The study of subjective feelings of low-frequency noise in the substation has become the essential part. Therefore, this paper takes the noise emitted at the boundary of the actual substation as the object, analyzes the annoyance degree and puts forward the limit suggestions combined with the existing standards. The results show that 55 dB（A） is the sudden increase point of noise annoyance, and loudness determines the annoyance, which is significantly positively correlated with annoyance. The results provide a reference for the prediction and prevention of noise pollution in substations.