In order to effectively monitor the flow rate of pipeline transportation and the effective iron content of iron concentrate pulp, the methods of inductance detection and coherence analysis are used to detect the flow rate and iron content. According to the ferromagnetic substances contained in the iron concentrate pulp will change the permeability characteristics in the coil, the coil is connected to the bridge to get an electrical signal, and the time required for the pulp to flow from one coil to another coil is calculated by coherence analysis. In addition, according to this property, the relationship between the signal and the iron content can be deduced by detecting the change of the signal. The experimental results show that the method can accurately detect the flow rate of iron concentrate pulp, and can directly reflect the relationship between iron content and detection signal.