Abstract: Investigated are the mechanical properties and microstructures of the 25Mn2V steels as quenched at different temperatures（850，880，910，950，1 000 and 1 050℃）and tempered at 600℃by means of tensile test，hardness test and metallographic test.The test results show that the 25Mn2V steel presents maximum mechanical properties after being quenched at 910℃.However，along with the quenching temperature is going up to 950℃，its after-quench microstructure is obviously getting coarsened，and its mechanical properties are getting decreased.