In order to study the electric field induced by magnetic hull of moving ship, a mathematical model was proposed based on Coulomb and Biot-Savart laws. The correctness of this model was verified by the experimental measurements. The model has the characteristics of wide applicability and high computational precision, on the basis of which, the induced electric field distribution of moving ship was proposed. The simulation calculation was performed using the magnetic field data of a real ship.The result indicates that the induced electric field reaches 1 mV/m around the ship, and it could be detectable.