Abstract: The forging experiments of 5CrNiMoV new hot working die steel containing vanadium were carried out at different forging temperatures, and the microstructure, thermal fatigue property and high temperature wear resistance were tested and compared. The results show that when the final forging temperature is 830℃, compared with those of 1070℃ initial forging temperature forging, the thermal fatigue crack grade of 5CrNiMoV hot working die steel forged at the initial forging temperature of 1100℃ is reduced from grade 5 to grade 2, and the high temperature wear volume is reduced from 39 ×10^-3mm³ to 18×10^-3mm³. When the initial forging temperature is 1100℃, compared with those of 860℃ final forging temperature,the thermal fatigue crack grade of 5CrNiMoV hot working die steel forged at the final forging temperature of 830℃ is reduced from grade 4 to grade 2, and the high temperature wear volume is reduced from 32×10^-3mm³ to 18×10^-3mm³. The thermal fatigue performance and high temperature wear performance of the die steel forged at the initial forging temperature of 1100℃and the final forging temperature of 830℃ are obviously improved.