Bi3.15Nd0.85Ti3O12 ceramics with Ta/Nb doping were prepared to construct Bi3.15Nd0.85Ti3-2xTaxNbxO12 (x= 0,0.02,0.04,0.06） ferroelectric ceramics by using the conventional solid phase sintering process . The influence of Ta/Nb doping on the crystal structure and electric properties of the Bi3.15Nd0.85Ti3O12 ceramics. Results showed that the Ta/Nb doping could not change the perovskite crystal structure of Bi3.15Nd0.85Ti3O12 ceramic, the residual polarization value was increased significantly, and the electric hysteresis loop (Pr-Ec) was good. The remaining polarization (2Pr) and coercive field strength (2Ec) of Bi3.15Nd0.85Ti3-2xTaxNbxO12 are 25.07 μC/cm2 and 31.1 kV/cm respectively at the voltage of 45 V and test frequency of 0.1 kHz and the C-V curve presented the standard butterfly.