Addressing the issue of periodic noise in surface monitoring of microseismic data during hydraulic fracturing, which is caused by significant mechanical equipment and environmental interference, traditional methods have been found to be insufficient in their research of periodic noise. This paper conducts an analysis of the characteristics of periodic noise within actual microseismic data and introduces an effective method for the suppression of periodic noise in the microseismic background. The approach is primarily two fold: initially, it targets the suppression of continuous periodic noise present in the microseismic data, followed by the elimination of any remaining non-continuous periodic noise. The method presented in this paper is validated using a set of real microseismic monitoring outcomes, and the results substantiate the genuine effectiveness of the proposed technique.