The invention discloses an electromagnetic type oil metal particle monitoring sensor resistant to environmental magnetic field interference. The electromagnetic type oil metal particle monitoring sensor comprises a metal particle sensing unit and a smart transmitter, wherein the metal particle sensing unit is used for inducing and producing induced voltage when metal particles pass by the sensor; and the smart transmitter is used for generating an excitation signal required by the metal particle sensing unit, sending the excitation signal to the metal particle sensing unit, receiving an induced voltage signal output by the metal particle sensing unit, eliminating interference of an external environment magnetic field and influences of an excitation magnetic field, obtaining a useful signal induced when the metal particles pass by the sensor, performing analog-digital conversion and processing on the signal, eliminating circuit noise, recognizing and counting the metal particles and uploading information to a network. According to the sensor, the disturbance resisting capacity and the recognition capability of tiny metal particles can be improved, and a high-performance monitor is provided for on-line monitoring of metal particles in lubricating oil.