The state of the wear particles in the oils is complex and prone to aggregation.In order to obtain the wear particle information accurately,the mathematical model of multiple wear particles was established.In order to study the influence of irregular shape of abrasive particles in the oils on the electromagnetic characteristics of the embedded inductive sensor,the simulation model of embedded inductive sensor was established with Maxwell.The inductance,magnetic flux,and coupling coefficient of multiple wear particles were studied based on the simulation model.The results show that the inductance of double wear particles is greater than that of single wear particle,and the inductance of columnar wear particle is greater than that of spherical one.The effect of relative position between spherical wear particle and columnar wear particle on the inductance is small.