Starting from the basic principle of the vertical configuration of the receiving and transmitting coils of torpedo electromagnetic fuze, the ambiguity of operating range caused by the double receiving coils located on the torpedo axis and deviating from the torpedo axis were analyzed respectively. For the first case, the modulo operation of the double receiving coils was proposed to eliminate the ambiguity of the operating distance; for the second case, a pair of coils was appended to the symmetrical position and the output signal of the symmetrical position coil was averaged, then the modulo operation was taken to eliminate the ambiguity of the operating range. Simulation results show that the method can effectively eliminate the ambiguity of the operating range and improve the operating range of the electromagnetic fuze.