The ZnNb2O6 ceramic powder was prepared by the conventional solid state reaction method. The effects of different amount of V2O5 addition on the sintering behaviors and dielectric properties of ZnNb2O6 ceramics have been investigated systematically. The results showed that the sintering temperature of ZnNb2O6 ceramics was lowered to 1 050 ℃, and the second phase of ZnV2O6 had been observed in sintered samples with the V2O5 addition content higher than 1.0wt%. The temperature coefficient of resonant frequency(τf) values were shifted toward zero direction with the increase of V2O5 addition. ZnNb2O6 ceramic with 1.0wt% V2O5 addition sintered at 1 050 ℃ for 3 h have the optimum dielectric properties: εr=28, tan δ=0.000 6, τf=-42.5×10-6/ ℃ (at 1 MHz).