Abstract: To reduce the interference effect of belt conveyor on mine transient electromagnetic detection, numerical simulation and field test are used to analyze the response characteristics of belt conveyor to mine transient electromagnetic detection, and the processing method of interference suppression using polynomial fitting correction function is discussed. The results show that the interference of the belt conveyor on the secondary field is greater in the early and middle stages than in the later stages, and there is a certain time shift. The ratio of non-interference data to interference data has a certain relationship with the acquisition time. The correction function can effectively eliminate the false anomalies caused by the belt conveyor and greatly improve the detection effect of the mine transient electromagnetic method.